20115250331 has 4 divisors (see below), whose sum is σ = 21943909464. Its totient is φ = 18286591200.

The previous prime is 20115250327. The next prime is 20115250349. The reversal of 20115250331 is 13305251102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20115250331 - 2² = 20115250327 is a prime.

It is a super-2 number, since 2×20115250331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20115250297 and 20115250306.

It is not an unprimeable number, because it can be changed into a prime (20115250321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914329550 + ... + 914329571.

It is an arithmetic number, because the mean of its divisors is an integer number (5485977366).

Almost surely, 2^20115250331 is an apocalyptic number.

20115250331 is a deficient number, since it is larger than the sum of its proper divisors (1828659133).

20115250331 is a wasteful number, since it uses less digits than its factorization.

20115250331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828659132.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 20115250331 in words is "twenty billion, one hundred fifteen million, two hundred fifty thousand, three hundred thirty-one".