20739107456 has 16 divisors (see below), whose sum is σ = 41316190890. Its totient is φ = 10369553664.

The previous prime is 20739107447. The next prime is 20739107461. The reversal of 20739107456 is 65470193702.

It can be written as a sum of positive squares in only one way, i.e., 14563662400 + 6175445056 = 120680^2 + 78584^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×20739107456² (a number of 21 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 81012011 + ... + 81012266.

Almost surely, 2^20739107456 is an apocalyptic number.

It is an amenable number.

20739107456 is a deficient number, since it is larger than the sum of its proper divisors (20577083434).

20739107456 is an equidigital number, since it uses as much as digits as its factorization.

20739107456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162024291 (or 162024279 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 20739107456 in words is "twenty billion, seven hundred thirty-nine million, one hundred seven thousand, four hundred fifty-six".