20152155015 has 48 divisors (see below), whose sum is σ = 35425728000. Its totient is φ = 10596418560.

The previous prime is 20152154993. The next prime is 20152155031. The reversal of 20152155015 is 51055125102.

20152155015 is a `hidden beast` number, since 2 + 0 + 152 + 1 + 5 + 501 + 5 = 666.

It is not a de Polignac number, because 20152155015 - 2¹² = 20152150919 is a prime.

It is a super-2 number, since 2×20152155015² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20152155015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960861 + ... + 981609.

It is an arithmetic number, because the mean of its divisors is an integer number (738036000).

Almost surely, 2^20152155015 is an apocalyptic number.

20152155015 is a deficient number, since it is larger than the sum of its proper divisors (15273572985).

20152155015 is a wasteful number, since it uses less digits than its factorization.

20152155015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21064 (or 21061 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The spelling of 20152155015 in words is "twenty billion, one hundred fifty-two million, one hundred fifty-five thousand, fifteen".