20261184264 has 64 divisors (see below), whose sum is σ = 56514744000. Its totient is φ = 6725687040.

The previous prime is 20261184217. The next prime is 20261184287. The reversal of 20261184264 is 46248116202.

It is a super-2 number, since 2×20261184264² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 142554 + ... + 246665.

It is an arithmetic number, because the mean of its divisors is an integer number (883042875).

Almost surely, 2^20261184264 is an apocalyptic number.

20261184264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20261184264 is an abundant number, since it is smaller than the sum of its proper divisors (36253559736).

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

20261184264 is a wasteful number, since it uses less digits than its factorization.

20261184264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389475 (or 389465 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 20261184264 in words is "twenty billion, two hundred sixty-one million, one hundred eighty-four thousand, two hundred sixty-four".