20617703464 has 32 divisors (see below), whose sum is σ = 38966639400. Its totient is φ = 10226810880.

The previous prime is 20617703461. The next prime is 20617703503. The reversal of 20617703464 is 46430771602.

It can be written as a sum of positive squares in 4 ways, for example, as 20375278564 + 242424900 = 142742^2 + 15570^2 .

It is a super-2 number, since 2×20617703464² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20617703461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792292 + ... + 817900.

Almost surely, 2^20617703464 is an apocalyptic number.

It is an amenable number.

20617703464 is a deficient number, since it is larger than the sum of its proper divisors (18348935936).

20617703464 is a wasteful number, since it uses less digits than its factorization.

20617703464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26413 (or 26409 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 20617703464 in words is "twenty billion, six hundred seventeen million, seven hundred three thousand, four hundred sixty-four".