21926152648 has 8 divisors (see below), whose sum is σ = 41111536230. Its totient is φ = 10963076320.

The previous prime is 21926152631. The next prime is 21926152697. The reversal of 21926152648 is 84625162912.

It can be written as a sum of positive squares in only one way, i.e., 21915249444 + 10903204 = 148038^2 + 3302^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21926152598 and 21926152607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370384533 + ... + 1370384548.

Almost surely, 2^21926152648 is an apocalyptic number.

It is an amenable number.

21926152648 is a deficient number, since it is larger than the sum of its proper divisors (19185383582).

21926152648 is a wasteful number, since it uses less digits than its factorization.

21926152648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740769087 (or 2740769083 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The spelling of 21926152648 in words is "twenty-one billion, nine hundred twenty-six million, one hundred fifty-two thousand, six hundred forty-eight".