21461499196 has 24 divisors (see below), whose sum is σ = 37746543744. Its totient is φ = 10676898480.

The previous prime is 21461499187. The next prime is 21461499197. The reversal of 21461499196 is 69199416412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461499197) 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, 685051 + ... + 715693.

It is an arithmetic number, because the mean of its divisors is an integer number (1572772656).

Almost surely, 2^21461499196 is an apocalyptic number.

It is an amenable number.

21461499196 is a deficient number, since it is larger than the sum of its proper divisors (16285044548).

21461499196 is a wasteful number, since it uses less digits than its factorization.

21461499196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31521 (or 31519 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The spelling of 21461499196 in words is "twenty-one billion, four hundred sixty-one million, four hundred ninety-nine thousand, one hundred ninety-six".