20511005602 has 16 divisors (see below), whose sum is σ = 32086397952. Its totient is φ = 9822360960.

The previous prime is 20511005591. The next prime is 20511005639. The reversal of 20511005602 is 20650011502.

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, 1699258 + ... + 1711285.

It is an arithmetic number, because the mean of its divisors is an integer number (2005399872).

Almost surely, 2^20511005602 is an apocalyptic number.

20511005602 is a deficient number, since it is larger than the sum of its proper divisors (11575392350).

20511005602 is a wasteful number, since it uses less digits than its factorization.

20511005602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410673.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 20511005602 in words is "twenty billion, five hundred eleven million, five thousand, six hundred two".