20922411825 has 36 divisors (see below), whose sum is σ = 42827848128. Its totient is φ = 9564530400.

The previous prime is 20922411803. The next prime is 20922411871. The reversal of 20922411825 is 52811422902.

It is not a de Polignac number, because 20922411825 - 2¹⁸ = 20922149681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20922411825.

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, 6640461 + ... + 6643610.

It is an arithmetic number, because the mean of its divisors is an integer number (1189662448).

Almost surely, 2^20922411825 is an apocalyptic number.

20922411825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20922411825 is an abundant number, since it is smaller than the sum of its proper divisors (21905436303).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20922411825 is a wasteful number, since it uses less digits than its factorization.

20922411825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13284094 (or 13284086 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 20922411825 in words is "twenty billion, nine hundred twenty-two million, four hundred eleven thousand, eight hundred twenty-five".