20566581002 has 32 divisors (see below), whose sum is σ = 35130879360. Its totient is φ = 8938621120.

The previous prime is 20566580953. The next prime is 20566581019. The reversal of 20566581002 is 20018566502.

It is a super-2 number, since 2×20566581002² (a number of 21 digits) contains 22 as substring.

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, 1721024 + ... + 1732932.

It is an arithmetic number, because the mean of its divisors is an integer number (1097839980).

Almost surely, 2^20566581002 is an apocalyptic number.

20566581002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20566581002 is a deficient number, since it is larger than the sum of its proper divisors (14564298358).

20566581002 is a wasteful number, since it uses less digits than its factorization.

20566581002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15358.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 20566581002 in words is "twenty billion, five hundred sixty-six million, five hundred eighty-one thousand, two".