21336363731 has 8 divisors (see below), whose sum is σ = 21474028800. Its totient is φ = 21198781512.

The previous prime is 21336363721. The next prime is 21336363733. The reversal of 21336363731 is 13736363312.

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

It is a cyclic number.

It is not a de Polignac number, because 21336363731 - 2⁶ = 21336363667 is a prime.

It is a super-2 number, since 2×21336363731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21336363733) 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, 545570 + ... + 583368.

It is an arithmetic number, because the mean of its divisors is an integer number (2684253600).

Almost surely, 2^21336363731 is an apocalyptic number.

21336363731 is a deficient number, since it is larger than the sum of its proper divisors (137665069).

21336363731 is a wasteful number, since it uses less digits than its factorization.

21336363731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41425.

The product of its digits is 122472, while the sum is 38.

The spelling of 21336363731 in words is "twenty-one billion, three hundred thirty-six million, three hundred sixty-three thousand, seven hundred thirty-one".