20562215721602 has 16 divisors (see below), whose sum is σ = 31838393184000. Its totient is φ = 9949420570320.

The previous prime is 20562215721589. The next prime is 20562215721647. The reversal of 20562215721602 is 20612751226502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20562215721602.

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, 21577649 + ... + 22510427.

It is an arithmetic number, because the mean of its divisors is an integer number (1989899574000).

Almost surely, 2^{20562215721602} is an apocalyptic number.

20562215721602 is a deficient number, since it is larger than the sum of its proper divisors (11276177462398).

20562215721602 is a wasteful number, since it uses less digits than its factorization.

20562215721602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288361.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 20562215721602 in words is "twenty trillion, five hundred sixty-two billion, two hundred fifteen million, seven hundred twenty-one thousand, six hundred two".