21046458396 has 24 divisors (see below), whose sum is σ = 49153199760. Its totient is φ = 7009086592.

The previous prime is 21046458283. The next prime is 21046458397. The reversal of 21046458396 is 69385464012.

It is a super-2 number, since 2×21046458396² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046458397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786231 + ... + 812558.

It is an arithmetic number, because the mean of its divisors is an integer number (2048049990).

Almost surely, 2^21046458396 is an apocalyptic number.

It is an amenable number.

21046458396 is an abundant number, since it is smaller than the sum of its proper divisors (28106741364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21046458396 is a wasteful number, since it uses less digits than its factorization.

21046458396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599893 (or 1599891 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 21046458396 in words is "twenty-one billion, forty-six million, four hundred fifty-eight thousand, three hundred ninety-six".