2139706900 has 18 divisors (see below), whose sum is σ = 4643164190. Its totient is φ = 855882720.

The previous prime is 2139706889. The next prime is 2139706909. The reversal of 2139706900 is 96079312.

It can be written as a sum of positive squares in 3 ways, for example, as 451647504 + 1688059396 = 21252^2 + 41086^2 .

It is a super-2 number, since 2×2139706900² = 9156691235815220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2139706900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139706909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10698435 + ... + 10698634.

Almost surely, 2^2139706900 is an apocalyptic number.

2139706900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2139706900 is an abundant number, since it is smaller than the sum of its proper divisors (2503457290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139706900 is a wasteful number, since it uses less digits than its factorization.

2139706900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21397083 (or 21397076 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 2139706900 is about 46256.9659618959. The cubic root of 2139706900 is about 1288.5999071647.

The spelling of 2139706900 in words is "two billion, one hundred thirty-nine million, seven hundred six thousand, nine hundred".