20409252960 has 48 divisors (see below), whose sum is σ = 64289148336. Its totient is φ = 5442467328.

The previous prime is 20409252959. The next prime is 20409252973. The reversal of 20409252960 is 6925290402.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21259159 + ... + 21260118.

It is an arithmetic number, because the mean of its divisors is an integer number (1339357257).

Almost surely, 2^20409252960 is an apocalyptic number.

20409252960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20409252960 is an abundant number, since it is smaller than the sum of its proper divisors (43879895376).

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

20409252960 is a wasteful number, since it uses less digits than its factorization.

20409252960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42519295 (or 42519287 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 20409252960 in words is "twenty billion, four hundred nine million, two hundred fifty-two thousand, nine hundred sixty".