21412603464 has 128 divisors (see below), whose sum is σ = 63301754880. Its totient is φ = 5906534400.

The previous prime is 21412603447. The next prime is 21412603493. The reversal of 21412603464 is 46430621412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2302504 + ... + 2311784.

It is an arithmetic number, because the mean of its divisors is an integer number (494544960).

Almost surely, 2^21412603464 is an apocalyptic number.

21412603464 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 21412603464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31650877440).

21412603464 is an abundant number, since it is smaller than the sum of its proper divisors (41889151416).

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

21412603464 is a wasteful number, since it uses less digits than its factorization.

21412603464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9771 (or 9767 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 21412603464 in words is "twenty-one billion, four hundred twelve million, six hundred three thousand, four hundred sixty-four".