20152155101 has 16 divisors (see below), whose sum is σ = 21956785200. Its totient is φ = 18384081408.

The previous prime is 20152155097. The next prime is 20152155137. The reversal of 20152155101 is 10155125102.

It can be written as a sum of positive squares in 8 ways, for example, as 12972982201 + 7179172900 = 113899^2 + 84730^2 .

It is a cyclic number.

It is not a de Polignac number, because 20152155101 - 2² = 20152155097 is a prime.

It is a super-2 number, since 2×20152155101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152155301) 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, 4205615 + ... + 4210403.

It is an arithmetic number, because the mean of its divisors is an integer number (1372299075).

Almost surely, 2^20152155101 is an apocalyptic number.

It is an amenable number.

20152155101 is a deficient number, since it is larger than the sum of its proper divisors (1804630099).

20152155101 is a wasteful number, since it uses less digits than its factorization.

20152155101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528.

The product of its (nonzero) digits is 500, while the sum is 23.

The spelling of 20152155101 in words is "twenty billion, one hundred fifty-two million, one hundred fifty-five thousand, one hundred one".