20626479464 has 16 divisors (see below), whose sum is σ = 38678480100. Its totient is φ = 10312218112.

The previous prime is 20626479463. The next prime is 20626479481. The reversal of 20626479464 is 46497462602.

It can be written as a sum of positive squares in 2 ways, for example, as 15873480100 + 4752999364 = 125990^2 + 68942^2 .

It is not an unprimeable number, because it can be changed into a prime (20626479463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38207 + ... + 206670.

Almost surely, 2^20626479464 is an apocalyptic number.

It is an amenable number.

20626479464 is a deficient number, since it is larger than the sum of its proper divisors (18052000636).

20626479464 is a wasteful number, since it uses less digits than its factorization.

20626479464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255412 (or 255408 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 50.

The spelling of 20626479464 in words is "twenty billion, six hundred twenty-six million, four hundred seventy-nine thousand, four hundred sixty-four".