20520055701 has 40 divisors (see below), whose sum is σ = 30891404544. Its totient is φ = 13574252160.

The previous prime is 20520055691. The next prime is 20520055753. The reversal of 20520055701 is 10755002502.

It is a happy number.

20520055701 is a `hidden beast` number, since 20 + 520 + 0 + 55 + 70 + 1 = 666.

It is not a de Polignac number, because 20520055701 - 2⁶ = 20520055637 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 (20520055781) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6085546 + ... + 6088916.

Almost surely, 2^20520055701 is an apocalyptic number.

It is an amenable number.

20520055701 is a deficient number, since it is larger than the sum of its proper divisors (10371348843).

20520055701 is a wasteful number, since it uses less digits than its factorization.

20520055701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943 (or 3934 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The spelling of 20520055701 in words is "twenty billion, five hundred twenty million, fifty-five thousand, seven hundred one".