20635188416 has 14 divisors (see below), whose sum is σ = 40947952140. Its totient is φ = 10317594176.

The previous prime is 20635188403. The next prime is 20635188437. The reversal of 20635188416 is 61488153602.

It is a super-2 number, since 2×20635188416² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161212346 + ... + 161212473.

Almost surely, 2^20635188416 is an apocalyptic number.

It is an amenable number.

20635188416 is a deficient number, since it is larger than the sum of its proper divisors (20312763724).

20635188416 is an equidigital number, since it uses as much as digits as its factorization.

20635188416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322424831 (or 322424821 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 20635188416 in words is "twenty billion, six hundred thirty-five million, one hundred eighty-eight thousand, four hundred sixteen".