21458707963 has 32 divisors (see below), whose sum is σ = 29304322560. Its totient is φ = 15194780160.

The previous prime is 21458707957. The next prime is 21458707967. The reversal of 21458707963 is 36970785412.

It is not a de Polignac number, because 21458707963 - 2⁹ = 21458707451 is a prime.

It is a super-2 number, since 2×21458707963² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21458707963.

It is not an unprimeable number, because it can be changed into a prime (21458707967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244681 + ... + 320602.

It is an arithmetic number, because the mean of its divisors is an integer number (915760080).

It is a 1-persistent number, because it is pandigital, but 2⋅21458707963 = 42917415926 is not.

Almost surely, 2^21458707963 is an apocalyptic number.

21458707963 is a deficient number, since it is larger than the sum of its proper divisors (7845614597).

21458707963 is a wasteful number, since it uses less digits than its factorization.

21458707963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565347.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 21458707963 in words is "twenty-one billion, four hundred fifty-eight million, seven hundred seven thousand, nine hundred sixty-three".