20409948264 has 64 divisors (see below), whose sum is σ = 54062173440. Its totient is φ = 6398873600.

The previous prime is 20409948263. The next prime is 20409948269. The reversal of 20409948264 is 46284990402.

It is a super-2 number, since 2×20409948264² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20409948263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630064 + ... + 661664.

It is an arithmetic number, because the mean of its divisors is an integer number (844721460).

Almost surely, 2^20409948264 is an apocalyptic number.

20409948264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20409948264 is an abundant number, since it is smaller than the sum of its proper divisors (33652225176).

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

20409948264 is a wasteful number, since it uses less digits than its factorization.

20409948264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33210 (or 33206 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 20409948264 in words is "twenty billion, four hundred nine million, nine hundred forty-eight thousand, two hundred sixty-four".