21929304749092 has 48 divisors (see below), whose sum is σ = 42501618516672. Its totient is φ = 9837444988800.

The previous prime is 21929304749089. The next prime is 21929304749111. The reversal of 21929304749092 is 29094740392912.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21929304749092.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36887034 + ... + 37476817.

It is an arithmetic number, because the mean of its divisors is an integer number (885450385764).

Almost surely, 2^{21929304749092} is an apocalyptic number.

It is an amenable number.

21929304749092 is a deficient number, since it is larger than the sum of its proper divisors (20572313767580).

21929304749092 is a wasteful number, since it uses less digits than its factorization.

21929304749092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74364028 (or 74364026 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 21929304749092 in words is "twenty-one trillion, nine hundred twenty-nine billion, three hundred four million, seven hundred forty-nine thousand, ninety-two".