21462763331 has 4 divisors (see below), whose sum is σ = 21464234064. Its totient is φ = 21461292600.

The previous prime is 21462763303. The next prime is 21462763351. The reversal of 21462763331 is 13336726412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21462763331 is a prime.

It is a super-2 number, since 2×21462763331² (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 (21462763351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713255 + ... + 742736.

It is an arithmetic number, because the mean of its divisors is an integer number (5366058516).

Almost surely, 2^21462763331 is an apocalyptic number.

21462763331 is a deficient number, since it is larger than the sum of its proper divisors (1470733).

21462763331 is a wasteful number, since it uses less digits than its factorization.

21462763331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470732.

The product of its digits is 108864, while the sum is 38.

The spelling of 21462763331 in words is "twenty-one billion, four hundred sixty-two million, seven hundred sixty-three thousand, three hundred thirty-one".