20461172264 has 32 divisors (see below), whose sum is σ = 41724917640. Its totient is φ = 9350112000.

The previous prime is 20461172261. The next prime is 20461172287. The reversal of 20461172264 is 46227116402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15764811364 + 4696360900 = 125558^2 + 68530^2 .

It is not an unprimeable number, because it can be changed into a prime (20461172261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963467 + ... + 984474.

Almost surely, 2^20461172264 is an apocalyptic number.

It is an amenable number.

20461172264 is an abundant number, since it is smaller than the sum of its proper divisors (21263745376).

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

20461172264 is a wasteful number, since it uses less digits than its factorization.

20461172264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948061 (or 1948057 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

Adding to 20461172264 its reverse (46227116402), we get a palindrome (66688288666).

The spelling of 20461172264 in words is "twenty billion, four hundred sixty-one million, one hundred seventy-two thousand, two hundred sixty-four".