21310242574 has 64 divisors (see below), whose sum is σ = 34590044160. Its totient is φ = 9829797120.

The previous prime is 21310242559. The next prime is 21310242619. The reversal of 21310242574 is 47524201312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16058299 + ... + 16059625.

It is an arithmetic number, because the mean of its divisors is an integer number (540469440).

Almost surely, 2^21310242574 is an apocalyptic number.

21310242574 is a deficient number, since it is larger than the sum of its proper divisors (13279801586).

21310242574 is a wasteful number, since it uses less digits than its factorization.

21310242574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 21310242574 its reverse (47524201312), we get a palindrome (68834443886).

The spelling of 21310242574 in words is "twenty-one billion, three hundred ten million, two hundred forty-two thousand, five hundred seventy-four".