20925968889 has 16 divisors (see below), whose sum is σ = 31889354112. Its totient is φ = 11956885248.

The previous prime is 20925968887. The next prime is 20925968891. The reversal of 20925968889 is 98886952902.

It is an interprime number because it is at equal distance from previous prime (20925968887) and next prime (20925968891).

It is not a de Polignac number, because 20925968889 - 2¹ = 20925968887 is a prime.

It is a super-3 number, since 3×20925968889³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20925968887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433027 + ... + 478919.

It is an arithmetic number, because the mean of its divisors is an integer number (1993084632).

Almost surely, 2^20925968889 is an apocalyptic number.

It is an amenable number.

20925968889 is a deficient number, since it is larger than the sum of its proper divisors (10963385223).

20925968889 is a wasteful number, since it uses less digits than its factorization.

20925968889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67616.

The product of its (nonzero) digits is 44789760, while the sum is 66.

The spelling of 20925968889 in words is "twenty billion, nine hundred twenty-five million, nine hundred sixty-eight thousand, eight hundred eighty-nine".