20153925 has 72 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 9177600.

The previous prime is 20153923. The next prime is 20153941. The reversal of 20153925 is 52935102.

It is not a de Polignac number, because 20153925 - 2¹ = 20153923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41836 + ... + 42314.

It is an arithmetic number, because the mean of its divisors is an integer number (580320).

Almost surely, 2^20153925 is an apocalyptic number.

20153925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20153925 is an abundant number, since it is smaller than the sum of its proper divisors (21629115).

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

20153925 is a wasteful number, since it uses less digits than its factorization.

20153925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 20153925 is about 4489.3123081381. The cubic root of 20153925 is about 272.1363440216.

The spelling of 20153925 in words is "twenty million, one hundred fifty-three thousand, nine hundred twenty-five".