21477246264 has 96 divisors (see below), whose sum is σ = 58590604800. Its totient is φ = 7107155520.

The previous prime is 21477246223. The next prime is 21477246281. The reversal of 21477246264 is 46264277412.

21477246264 is a `hidden beast` number, since 2 + 14 + 7 + 7 + 2 + 4 + 626 + 4 = 666.

It is a super-2 number, since 2×21477246264² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11121379 + ... + 11123309.

It is an arithmetic number, because the mean of its divisors is an integer number (610318800).

Almost surely, 2^21477246264 is an apocalyptic number.

21477246264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21477246264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29295302400).

21477246264 is an abundant number, since it is smaller than the sum of its proper divisors (37113358536).

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

21477246264 is a wasteful number, since it uses less digits than its factorization.

21477246264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985 (or 2978 counting only the distinct ones).

The product of its digits is 903168, while the sum is 45.

The spelling of 21477246264 in words is "twenty-one billion, four hundred seventy-seven million, two hundred forty-six thousand, two hundred sixty-four".