21734574577 has 4 divisors (see below), whose sum is σ = 21735631476. Its totient is φ = 21733517680.

The previous prime is 21734574559. The next prime is 21734574593. The reversal of 21734574577 is 77547543712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5695871841 + 16038702736 = 75471^2 + 126644^2 .

It is a cyclic number.

It is not a de Polignac number, because 21734574577 - 2¹⁵ = 21734541809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21734574527) 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, 496978 + ... + 538939.

It is an arithmetic number, because the mean of its divisors is an integer number (5433907869).

Almost surely, 2^21734574577 is an apocalyptic number.

It is an amenable number.

21734574577 is a deficient number, since it is larger than the sum of its proper divisors (1056899).

21734574577 is a wasteful number, since it uses less digits than its factorization.

21734574577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056898.

The product of its digits is 5762400, while the sum is 52.

The spelling of 21734574577 in words is "twenty-one billion, seven hundred thirty-four million, five hundred seventy-four thousand, five hundred seventy-seven".