21560322470 has 16 divisors (see below), whose sum is σ = 38865413520. Its totient is φ = 8611499424.

The previous prime is 21560322391. The next prime is 21560322493. The reversal of 21560322470 is 7422306512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571525 + ... + 1585184.

It is an arithmetic number, because the mean of its divisors is an integer number (2429088345).

Almost surely, 2^21560322470 is an apocalyptic number.

21560322470 is a deficient number, since it is larger than the sum of its proper divisors (17305091050).

21560322470 is a wasteful number, since it uses less digits than its factorization.

21560322470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157399.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 21560322470 its reverse (7422306512), we get a palindrome (28982628982).

The spelling of 21560322470 in words is "twenty-one billion, five hundred sixty million, three hundred twenty-two thousand, four hundred seventy".