20399825025 has 48 divisors (see below), whose sum is σ = 37807014720. Its totient is φ = 10783584000.

The previous prime is 20399825003. The next prime is 20399825059. The reversal of 20399825025 is 52052899302.

20399825025 is a `hidden beast` number, since 2 + 0 + 399 + 8 + 250 + 2 + 5 = 666.

It is not a de Polignac number, because 20399825025 - 2⁷ = 20399824897 is a prime.

It is a super-2 number, since 2×20399825025² (a number of 21 digits) contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57451 + ... + 210000.

It is an arithmetic number, because the mean of its divisors is an integer number (787646140).

Almost surely, 2^20399825025 is an apocalyptic number.

20399825025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20399825025 is a deficient number, since it is larger than the sum of its proper divisors (17407189695).

20399825025 is a wasteful number, since it uses less digits than its factorization.

20399825025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267583 (or 267572 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 20399825025 in words is "twenty billion, three hundred ninety-nine million, eight hundred twenty-five thousand, twenty-five".