21770757964 has 6 divisors (see below), whose sum is σ = 38098826444. Its totient is φ = 10885378980.

The previous prime is 21770757937. The next prime is 21770758001. The reversal of 21770757964 is 46975707712.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2721344742 + ... + 2721344749.

Almost surely, 2^21770757964 is an apocalyptic number.

It is an amenable number.

21770757964 is a deficient number, since it is larger than the sum of its proper divisors (16328068480).

21770757964 is a wasteful number, since it uses less digits than its factorization.

21770757964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442689495 (or 5442689493 counting only the distinct ones).

The product of its (nonzero) digits is 5186160, while the sum is 55.

The spelling of 21770757964 in words is "twenty-one billion, seven hundred seventy million, seven hundred fifty-seven thousand, nine hundred sixty-four".