20425335660 has 36 divisors (see below), whose sum is σ = 61956852048. Its totient is φ = 5446756128.

The previous prime is 20425335659. The next prime is 20425335713. The reversal of 20425335660 is 6653352402.

20425335660 is a `hidden beast` number, since 2 + 0 + 42 + 53 + 3 + 566 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56736864 + ... + 56737223.

It is an arithmetic number, because the mean of its divisors is an integer number (1721023668).

Almost surely, 2^20425335660 is an apocalyptic number.

20425335660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20425335660 is an abundant number, since it is smaller than the sum of its proper divisors (41531516388).

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

20425335660 is a wasteful number, since it uses less digits than its factorization.

20425335660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113474102 (or 113474097 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 20425335660 in words is "twenty billion, four hundred twenty-five million, three hundred thirty-five thousand, six hundred sixty".