21560010746 has 4 divisors (see below), whose sum is σ = 32340016122. Its totient is φ = 10780005372.

The previous prime is 21560010743. The next prime is 21560010799. The reversal of 21560010746 is 64701006512.

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., 20855692225 + 704318521 = 144415^2 + 26539^2 .

It is not an unprimeable number, because it can be changed into a prime (21560010743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5390002685 + ... + 5390002688.

Almost surely, 2^21560010746 is an apocalyptic number.

21560010746 is a deficient number, since it is larger than the sum of its proper divisors (10780005376).

21560010746 is a wasteful number, since it uses less digits than its factorization.

21560010746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10780005375.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 21560010746 in words is "twenty-one billion, five hundred sixty million, ten thousand, seven hundred forty-six".