21627875386 has 12 divisors (see below), whose sum is σ = 35129301102. Its totient is φ = 9982096176.

The previous prime is 21627875377. The next prime is 21627875429. The reversal of 21627875386 is 68357872612.

It can be written as a sum of positive squares in 3 ways, for example, as 4729175361 + 16898700025 = 68769^2 + 129995^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31993561 + ... + 31994236.

Almost surely, 2^21627875386 is an apocalyptic number.

21627875386 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21627875386 is a deficient number, since it is larger than the sum of its proper divisors (13501425716).

21627875386 is a wasteful number, since it uses less digits than its factorization.

21627875386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63987825 (or 63987812 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 55.

The spelling of 21627875386 in words is "twenty-one billion, six hundred twenty-seven million, eight hundred seventy-five thousand, three hundred eighty-six".