20431151226 has 24 divisors (see below), whose sum is σ = 44705790324. Its totient is φ = 6742953600.

The previous prime is 20431151179. The next prime is 20431151243. The reversal of 20431151226 is 62215113402.

20431151226 is a `hidden beast` number, since 2 + 0 + 431 + 1 + 5 + 1 + 226 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17794226025 + 2636925201 = 133395^2 + 51351^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20431151226.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5617311 + ... + 5620946.

Almost surely, 2^20431151226 is an apocalyptic number.

20431151226 is an abundant number, since it is smaller than the sum of its proper divisors (24274639098).

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

20431151226 is a wasteful number, since it uses less digits than its factorization.

20431151226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11238366 (or 11238363 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 20431151226 its reverse (62215113402), we get a palindrome (82646264628).

The spelling of 20431151226 in words is "twenty billion, four hundred thirty-one million, one hundred fifty-one thousand, two hundred twenty-six".