21733492464 has 120 divisors (see below), whose sum is σ = 61739142192. Its totient is φ = 7136225280.

The previous prime is 21733492453. The next prime is 21733492471. The reversal of 21733492464 is 46429433712.

21733492464 is a `hidden beast` number, since 2 + 1 + 73 + 34 + 92 + 464 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2784952 + ... + 2792744.

Almost surely, 2^21733492464 is an apocalyptic number.

21733492464 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 21733492464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30869571096).

21733492464 is an abundant number, since it is smaller than the sum of its proper divisors (40005649728).

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

21733492464 is a wasteful number, since it uses less digits than its factorization.

21733492464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095 (or 8086 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The spelling of 21733492464 in words is "twenty-one billion, seven hundred thirty-three million, four hundred ninety-two thousand, four hundred sixty-four".