20542044501 has 32 divisors (see below), whose sum is σ = 33225292800. Its totient is φ = 12439963440.

The previous prime is 20542044491. The next prime is 20542044511. The reversal of 20542044501 is 10544024502.

20542044501 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 204 + 450 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20542044491) and next prime (20542044511).

It is not a de Polignac number, because 20542044501 - 2⁷ = 20542044373 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 (20542044511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361720 + ... + 414638.

It is an arithmetic number, because the mean of its divisors is an integer number (1038290400).

Almost surely, 2^20542044501 is an apocalyptic number.

It is an amenable number.

20542044501 is a deficient number, since it is larger than the sum of its proper divisors (12683248299).

20542044501 is a wasteful number, since it uses less digits than its factorization.

20542044501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54246 (or 54240 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 20542044501 in words is "twenty billion, five hundred forty-two million, forty-four thousand, five hundred one".