20640313562 has 32 divisors (see below), whose sum is σ = 34621171200. Its totient is φ = 9147225600.

The previous prime is 20640313559. The next prime is 20640313607. The reversal of 20640313562 is 26531304602.

It is a super-2 number, since 2×20640313562² (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, 1580114 + ... + 1593122.

It is an arithmetic number, because the mean of its divisors is an integer number (1081911600).

Almost surely, 2^20640313562 is an apocalyptic number.

20640313562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20640313562 is a deficient number, since it is larger than the sum of its proper divisors (13980857638).

20640313562 is a wasteful number, since it uses less digits than its factorization.

20640313562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20640313562 in words is "twenty billion, six hundred forty million, three hundred thirteen thousand, five hundred sixty-two".