20881251675 has 36 divisors (see below), whose sum is σ = 37596534144. Its totient is φ = 11078337600.

The previous prime is 20881251649. The next prime is 20881251683. The reversal of 20881251675 is 57615218802.

It is not a de Polignac number, because 20881251675 - 2¹³ = 20881243483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20881251675.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 199972 + ... + 285921.

Almost surely, 2^20881251675 is an apocalyptic number.

20881251675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20881251675 is a deficient number, since it is larger than the sum of its proper divisors (16715282469).

20881251675 is a wasteful number, since it uses less digits than its factorization.

20881251675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486100 (or 486092 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 20881251675 in words is "twenty billion, eight hundred eighty-one million, two hundred fifty-one thousand, six hundred seventy-five".