20152881513 has 16 divisors (see below), whose sum is σ = 29921469760. Its totient is φ = 13405847328.

The previous prime is 20152881503. The next prime is 20152881533. The reversal of 20152881513 is 31518825102.

20152881513 is a `hidden beast` number, since 2 + 0 + 1 + 528 + 81 + 51 + 3 = 666.

It is not a de Polignac number, because 20152881513 - 2¹² = 20152877417 is a prime.

It is a super-2 number, since 2×20152881513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20152881503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804295 + ... + 828972.

It is an arithmetic number, because the mean of its divisors is an integer number (1870091860).

Almost surely, 2^20152881513 is an apocalyptic number.

It is an amenable number.

20152881513 is a deficient number, since it is larger than the sum of its proper divisors (9768588247).

20152881513 is a wasteful number, since it uses less digits than its factorization.

20152881513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633733 (or 1633727 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 20152881513 in words is "twenty billion, one hundred fifty-two million, eight hundred eighty-one thousand, five hundred thirteen".