20513046501 has 32 divisors (see below), whose sum is σ = 32145457920. Its totient is φ = 12901565952.

The previous prime is 20513046461. The next prime is 20513046509. The reversal of 20513046501 is 10564031502.

20513046501 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 3 + 0 + 4 + 650 + 1 = 666.

It is not a de Polignac number, because 20513046501 - 2¹⁰ = 20513045477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513046509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180916 + ... + 271581.

It is an arithmetic number, because the mean of its divisors is an integer number (1004545560).

Almost surely, 2^20513046501 is an apocalyptic number.

It is an amenable number.

20513046501 is a deficient number, since it is larger than the sum of its proper divisors (11632411419).

20513046501 is a wasteful number, since it uses less digits than its factorization.

20513046501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452602 (or 452596 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20513046501 in words is "twenty billion, five hundred thirteen million, forty-six thousand, five hundred one".