21547264486 has 24 divisors (see below), whose sum is σ = 35558752320. Its totient is φ = 9785257680.

The previous prime is 21547264483. The next prime is 21547264513. The reversal of 21547264486 is 68446274512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21547264483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228235 + ... + 308521.

It is an arithmetic number, because the mean of its divisors is an integer number (1481614680).

Almost surely, 2^21547264486 is an apocalyptic number.

21547264486 is a deficient number, since it is larger than the sum of its proper divisors (14011487834).

21547264486 is a wasteful number, since it uses less digits than its factorization.

21547264486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81420 (or 81409 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 49.

The spelling of 21547264486 in words is "twenty-one billion, five hundred forty-seven million, two hundred sixty-four thousand, four hundred eighty-six".