20513562401 has 16 divisors (see below), whose sum is σ = 21743769600. Its totient is φ = 19298643408.

The previous prime is 20513562383. The next prime is 20513562427. The reversal of 20513562401 is 10426531502.

It is a cyclic number.

It is not a de Polignac number, because 20513562401 - 2⁶ = 20513562337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20513562491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4068440 + ... + 4073478.

It is an arithmetic number, because the mean of its divisors is an integer number (1358985600).

Almost surely, 2^20513562401 is an apocalyptic number.

It is an amenable number.

20513562401 is a deficient number, since it is larger than the sum of its proper divisors (1230207199).

20513562401 is a wasteful number, since it uses less digits than its factorization.

20513562401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6508.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20513562401 in words is "twenty billion, five hundred thirteen million, five hundred sixty-two thousand, four hundred one".