21310242146 has 32 divisors (see below), whose sum is σ = 33507758592. Its totient is φ = 10152737280.

The previous prime is 21310242137. The next prime is 21310242157. The reversal of 21310242146 is 64124201312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1175765 + ... + 1193751.

It is an arithmetic number, because the mean of its divisors is an integer number (1047117456).

Almost surely, 2^21310242146 is an apocalyptic number.

21310242146 is a deficient number, since it is larger than the sum of its proper divisors (12197516446).

21310242146 is a wasteful number, since it uses less digits than its factorization.

21310242146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18314.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21310242146 its reverse (64124201312), we get a palindrome (85434443458).

The spelling of 21310242146 in words is "twenty-one billion, three hundred ten million, two hundred forty-two thousand, one hundred forty-six".