21976141952 has 24 divisors (see below), whose sum is σ = 43783936815. Its totient is φ = 10987232384.

The previous prime is 21976141907. The next prime is 21976142009. The reversal of 21976141952 is 25914167912.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10988070976 + 10988070976 = 104824^2 + 104824^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104824.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21976141897 and 21976141906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1670633 + ... + 1683735.

Almost surely, 2^21976141952 is an apocalyptic number.

It is an amenable number.

21976141952 is a deficient number, since it is larger than the sum of its proper divisors (21807794863).

21976141952 is an frugal number, since it uses more digits than its factorization.

21976141952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26220 (or 13105 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The spelling of 21976141952 in words is "twenty-one billion, nine hundred seventy-six million, one hundred forty-one thousand, nine hundred fifty-two".