21704054634 has 24 divisors (see below), whose sum is σ = 47050419780. Its totient is φ = 7230843648.

The previous prime is 21704054629. The next prime is 21704054639. The reversal of 21704054634 is 43645040712.

21704054634 is a `hidden beast` number, since 2 + 1 + 70 + 40 + 546 + 3 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21704054629) and next prime (21704054639).

It can be written as a sum of positive squares in 2 ways, for example, as 20982971025 + 721083609 = 144855^2 + 26853^2 .

It is not an unprimeable number, because it can be changed into a prime (21704054639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285157 + ... + 353160.

Almost surely, 2^21704054634 is an apocalyptic number.

21704054634 is an abundant number, since it is smaller than the sum of its proper divisors (25346365146).

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

21704054634 is a wasteful number, since it uses less digits than its factorization.

21704054634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640214 (or 640211 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 21704054634 in words is "twenty-one billion, seven hundred four million, fifty-four thousand, six hundred thirty-four".