20344544451 has 36 divisors (see below), whose sum is σ = 36915367216. Its totient is φ = 10568590560.

The previous prime is 20344544399. The next prime is 20344544459. The reversal of 20344544451 is 15444544302.

20344544451 is a `hidden beast` number, since 20 + 3 + 44 + 544 + 4 + 51 = 666.

It is not a de Polignac number, because 20344544451 - 2⁷ = 20344544323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20344544459) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1326796 + ... + 1342041.

Almost surely, 2^20344544451 is an apocalyptic number.

20344544451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20344544451 is a deficient number, since it is larger than the sum of its proper divisors (16570822765).

20344544451 is a wasteful number, since it uses less digits than its factorization.

20344544451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668872 (or 2668858 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

The spelling of 20344544451 in words is "twenty billion, three hundred forty-four million, five hundred forty-four thousand, four hundred fifty-one".