20445634416 has 40 divisors (see below), whose sum is σ = 52904978944. Its totient is φ = 6803974080.

The previous prime is 20445634393. The next prime is 20445634439. The reversal of 20445634416 is 61443654402.

It is an interprime number because it is at equal distance from previous prime (20445634393) and next prime (20445634439).

It is a super-2 number, since 2×20445634416² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321730 + ... + 380001.

Almost surely, 2^20445634416 is an apocalyptic number.

It is an amenable number.

20445634416 is an abundant number, since it is smaller than the sum of its proper divisors (32459344528).

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

20445634416 is a wasteful number, since it uses less digits than its factorization.

20445634416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702349 (or 702343 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

The spelling of 20445634416 in words is "twenty billion, four hundred forty-five million, six hundred thirty-four thousand, four hundred sixteen".