20746006408 has 8 divisors (see below), whose sum is σ = 38898762030. Its totient is φ = 10373003200.

The previous prime is 20746006397. The next prime is 20746006427. The reversal of 20746006408 is 80460064702.

It can be written as a sum of positive squares in only one way, i.e., 15982522084 + 4763484324 = 126422^2 + 69018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1296625393 + ... + 1296625408.

Almost surely, 2^20746006408 is an apocalyptic number.

It is an amenable number.

20746006408 is a deficient number, since it is larger than the sum of its proper divisors (18152755622).

20746006408 is a wasteful number, since it uses less digits than its factorization.

20746006408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593250807 (or 2593250803 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 20746006408 in words is "twenty billion, seven hundred forty-six million, six thousand, four hundred eight".