20121914 has 24 divisors (see below), whose sum is σ = 33126528. Its totient is φ = 9155520.

The previous prime is 20121901. The next prime is 20121919. The reversal of 20121914 is 41912102.

It is not an unprimeable number, because it can be changed into a prime (20121919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17357 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (1380272).

Almost surely, 2^20121914 is an apocalyptic number.

20121914 is a deficient number, since it is larger than the sum of its proper divisors (13004614).

20121914 is a wasteful number, since it uses less digits than its factorization.

20121914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 20121914 is about 4485.7456459322. The cubic root of 20121914 is about 271.9921872756.

The spelling of 20121914 in words is "twenty million, one hundred twenty-one thousand, nine hundred fourteen".