21764699484 has 48 divisors (see below), whose sum is σ = 55416506880. Its totient is φ = 6593523840.

The previous prime is 21764699483. The next prime is 21764699501. The reversal of 21764699484 is 48499646712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21764699483) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 496272 + ... + 538344.

It is an arithmetic number, because the mean of its divisors is an integer number (1154510560).

Almost surely, 2^21764699484 is an apocalyptic number.

It is an amenable number.

21764699484 is an abundant number, since it is smaller than the sum of its proper divisors (33651807396).

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

21764699484 is a wasteful number, since it uses less digits than its factorization.

21764699484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46010 (or 46008 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The spelling of 21764699484 in words is "twenty-one billion, seven hundred sixty-four million, six hundred ninety-nine thousand, four hundred eighty-four".