21748052762 has 4 divisors (see below), whose sum is σ = 32622079146. Its totient is φ = 10874026380.

The previous prime is 21748052761. The next prime is 21748052773. The reversal of 21748052762 is 26725084712.

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

It can be written as a sum of positive squares in only one way, i.e., 21105987841 + 642064921 = 145279^2 + 25339^2 .

It is not an unprimeable number, because it can be changed into a prime (21748052761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5437013189 + ... + 5437013192.

Almost surely, 2^21748052762 is an apocalyptic number.

21748052762 is a deficient number, since it is larger than the sum of its proper divisors (10874026384).

21748052762 is a wasteful number, since it uses less digits than its factorization.

21748052762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10874026383.

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 21748052762 in words is "twenty-one billion, seven hundred forty-eight million, fifty-two thousand, seven hundred sixty-two".