21460233784 has 48 divisors (see below), whose sum is σ = 44978232600. Its totient is φ = 9589293120.

The previous prime is 21460233671. The next prime is 21460233787. The reversal of 21460233784 is 48733206412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460233787) 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, 130767 + ... + 244990.

Almost surely, 2^21460233784 is an apocalyptic number.

It is an amenable number.

21460233784 is an abundant number, since it is smaller than the sum of its proper divisors (23517998816).

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

21460233784 is a wasteful number, since it uses less digits than its factorization.

21460233784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375844 (or 375829 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 21460233784 in words is "twenty-one billion, four hundred sixty million, two hundred thirty-three thousand, seven hundred eighty-four".