20445451624 has 16 divisors (see below), whose sum is σ = 41284085220. Its totient is φ = 9436362240.

The previous prime is 20445451613. The next prime is 20445451633. The reversal of 20445451624 is 42615454402.

It can be written as a sum of positive squares in 2 ways, for example, as 20417552100 + 27899524 = 142890^2 + 5282^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98295337 + ... + 98295544.

Almost surely, 2^20445451624 is an apocalyptic number.

It is an amenable number.

20445451624 is an abundant number, since it is smaller than the sum of its proper divisors (20838633596).

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

20445451624 is a wasteful number, since it uses less digits than its factorization.

20445451624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196590900 (or 196590896 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

The spelling of 20445451624 in words is "twenty billion, four hundred forty-five million, four hundred fifty-one thousand, six hundred twenty-four".