21412033764 has 24 divisors (see below), whose sum is σ = 54503359008. Its totient is φ = 6488495040.

The previous prime is 21412033697. The next prime is 21412033781. The reversal of 21412033764 is 46733021412.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81106057 + ... + 81106320.

It is an arithmetic number, because the mean of its divisors is an integer number (2270973292).

Almost surely, 2^21412033764 is an apocalyptic number.

It is an amenable number.

21412033764 is an abundant number, since it is smaller than the sum of its proper divisors (33091325244).

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

21412033764 is a wasteful number, since it uses less digits than its factorization.

21412033764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162212395 (or 162212393 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 21412033764 in words is "twenty-one billion, four hundred twelve million, thirty-three thousand, seven hundred sixty-four".