20418441764490 has 256 divisors, whose sum is σ = 71457569280000. Its totient is φ = 4019488116480.

The previous prime is 20418441764453. The next prime is 20418441764521. The reversal of 20418441764490 is 9446714481402.

20418441764490 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 8 + 441 + 76 + 44 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25450465 + ... + 26240484.

It is an arithmetic number, because the mean of its divisors is an integer number (279131130000).

Almost surely, 2^{20418441764490} is an apocalyptic number.

20418441764490 is an abundant number, since it is smaller than the sum of its proper divisors (51039127515510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20418441764490 is a wasteful number, since it uses less digits than its factorization.

20418441764490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51691002 (or 51690996 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 20418441764490 in words is "twenty trillion, four hundred eighteen billion, four hundred forty-one million, seven hundred sixty-four thousand, four hundred ninety".