20152502154 has 24 divisors (see below), whose sum is σ = 43801507620. Its totient is φ = 6696307968.

The previous prime is 20152502119. The next prime is 20152502231. The reversal of 20152502154 is 45120525102.

20152502154 is a `hidden beast` number, since 2 + 0 + 1 + 5 + 2 + 502 + 154 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12921550929 + 7230951225 = 113673^2 + 85035^2 .

It is a super-2 number, since 2×20152502154² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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 in 11 ways as a sum of consecutive naturals, for example, 1760199 + ... + 1771610.

Almost surely, 2^20152502154 is an apocalyptic number.

20152502154 is an abundant number, since it is smaller than the sum of its proper divisors (23649005466).

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

20152502154 is a wasteful number, since it uses less digits than its factorization.

20152502154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532134 (or 3532131 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 20152502154 in words is "twenty billion, one hundred fifty-two million, five hundred two thousand, one hundred fifty-four".