20351001156 has 48 divisors (see below), whose sum is σ = 50040533760. Its totient is φ = 6419481120.

The previous prime is 20351001133. The next prime is 20351001163. The reversal of 20351001156 is 65110015302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157591 + ... + 256001.

It is an arithmetic number, because the mean of its divisors is an integer number (1042511120).

Almost surely, 2^20351001156 is an apocalyptic number.

It is an amenable number.

20351001156 is an abundant number, since it is smaller than the sum of its proper divisors (29689532604).

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

20351001156 is a wasteful number, since it uses less digits than its factorization.

20351001156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99344 (or 99342 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 20351001156 its reverse (65110015302), we get a palindrome (85461016458).

The spelling of 20351001156 in words is "twenty billion, three hundred fifty-one million, one thousand, one hundred fifty-six".