21234177713 has 16 divisors (see below), whose sum is σ = 24508552320. Its totient is φ = 18020230656.

The previous prime is 21234177707. The next prime is 21234177721. The reversal of 21234177713 is 31777143212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21234177713 - 2⁶ = 21234177649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21234177733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470593 + ... + 1484961.

It is an arithmetic number, because the mean of its divisors is an integer number (1531784520).

Almost surely, 2^21234177713 is an apocalyptic number.

It is an amenable number.

21234177713 is a deficient number, since it is larger than the sum of its proper divisors (3274374607).

21234177713 is a wasteful number, since it uses less digits than its factorization.

21234177713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16456.

The product of its digits is 49392, while the sum is 38.

The spelling of 21234177713 in words is "twenty-one billion, two hundred thirty-four million, one hundred seventy-seven thousand, seven hundred thirteen".