20581365002 has 32 divisors (see below), whose sum is σ = 33792194304. Its totient is φ = 9323675200.

The previous prime is 20581364983. The next prime is 20581365017. The reversal of 20581365002 is 20056318502.

It is a self number, because there is not a number n which added to its sum of digits gives 20581365002.

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, 13000703 + ... + 13002285.

It is an arithmetic number, because the mean of its divisors is an integer number (1056006072).

Almost surely, 2^20581365002 is an apocalyptic number.

20581365002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20581365002 is a deficient number, since it is larger than the sum of its proper divisors (13210829302).

20581365002 is a wasteful number, since it uses less digits than its factorization.

20581365002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214.

The product of its (nonzero) digits is 14400, while the sum is 32.

It can be divided in two parts, 20581 and 365002, that added together give a palindrome (385583).

The spelling of 20581365002 in words is "twenty billion, five hundred eighty-one million, three hundred sixty-five thousand, two".