21614674731 has 8 divisors (see below), whose sum is σ = 31036456080. Its totient is φ = 13301338272.

The previous prime is 21614674693. The next prime is 21614674751. The reversal of 21614674731 is 13747641612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21614674731 - 2⁹ = 21614674219 is a prime.

It is a super-2 number, since 2×21614674731² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21614674751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277111176 + ... + 277111253.

It is an arithmetic number, because the mean of its divisors is an integer number (3879557010).

Almost surely, 2^21614674731 is an apocalyptic number.

21614674731 is a deficient number, since it is larger than the sum of its proper divisors (9421781349).

21614674731 is a wasteful number, since it uses less digits than its factorization.

21614674731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554222445.

The product of its digits is 169344, while the sum is 42.

The spelling of 21614674731 in words is "twenty-one billion, six hundred fourteen million, six hundred seventy-four thousand, seven hundred thirty-one".