21776651932 has 36 divisors (see below), whose sum is σ = 45412303104. Its totient is φ = 9105216960.

The previous prime is 21776651843. The next prime is 21776651977. The reversal of 21776651932 is 23915667712.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1346908 + ... + 1362979.

It is an arithmetic number, because the mean of its divisors is an integer number (1261452864).

Almost surely, 2^21776651932 is an apocalyptic number.

It is an amenable number.

21776651932 is an abundant number, since it is smaller than the sum of its proper divisors (23635651172).

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

21776651932 is a wasteful number, since it uses less digits than its factorization.

21776651932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709946 (or 2709937 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The spelling of 21776651932 in words is "twenty-one billion, seven hundred seventy-six million, six hundred fifty-one thousand, nine hundred thirty-two".