20642362624 has 36 divisors (see below), whose sum is σ = 44373643636. Its totient is φ = 9527242752.

The previous prime is 20642362613. The next prime is 20642362633. The reversal of 20642362624 is 42626324602.

It can be written as a sum of positive squares in 2 ways, for example, as 6234681600 + 14407681024 = 78960^2 + 120032^2 .

It is a super-2 number, since 2×20642362624² (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 3 ways as a sum of consecutive naturals, for example, 3097989 + ... + 3104644.

Almost surely, 2^20642362624 is an apocalyptic number.

It is an amenable number.

20642362624 is an abundant number, since it is smaller than the sum of its proper divisors (23731281012).

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

20642362624 is an equidigital number, since it uses as much as digits as its factorization.

20642362624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202662 (or 6202648 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 20642362624 in words is "twenty billion, six hundred forty-two million, three hundred sixty-two thousand, six hundred twenty-four".