20726436416 has 56 divisors (see below), whose sum is σ = 48625475520. Its totient is φ = 8576451072.

The previous prime is 20726436377. The next prime is 20726436427. The reversal of 20726436416 is 61463462702.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784670 + ... + 810653.

Almost surely, 2^20726436416 is an apocalyptic number.

It is an amenable number.

20726436416 is an abundant number, since it is smaller than the sum of its proper divisors (27899039104).

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

20726436416 is a wasteful number, since it uses less digits than its factorization.

20726436416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595371 (or 1595361 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 20726436416 in words is "twenty billion, seven hundred twenty-six million, four hundred thirty-six thousand, four hundred sixteen".