20135538512 has 10 divisors (see below), whose sum is σ = 39012605898. Its totient is φ = 10067769248.

The previous prime is 20135538481. The next prime is 20135538541. The reversal of 20135538512 is 21583553102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12940427536 + 7195110976 = 113756^2 + 84824^2 .

It is a super-2 number, since 2×20135538512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629235563 + ... + 629235594.

Almost surely, 2^20135538512 is an apocalyptic number.

It is an amenable number.

20135538512 is a deficient number, since it is larger than the sum of its proper divisors (18877067386).

20135538512 is a wasteful number, since it uses less digits than its factorization.

20135538512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258471165 (or 1258471159 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 20135538512 in words is "twenty billion, one hundred thirty-five million, five hundred thirty-eight thousand, five hundred twelve".