20125140 has 48 divisors (see below), whose sum is σ = 64401792. Its totient is φ = 4599936.

The previous prime is 20125117. The next prime is 20125153. The reversal of 20125140 is 4152102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23539 + ... + 24378.

It is an arithmetic number, because the mean of its divisors is an integer number (1341704).

Almost surely, 2^20125140 is an apocalyptic number.

20125140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20125140 is an abundant number, since it is smaller than the sum of its proper divisors (44276652).

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

20125140 is a wasteful number, since it uses less digits than its factorization.

20125140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47936 (or 47934 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20125140 is about 4486.1052149944. The cubic root of 20125140 is about 272.0067220080.

Adding to 20125140 its reverse (4152102), we get a palindrome (24277242).

The spelling of 20125140 in words is "twenty million, one hundred twenty-five thousand, one hundred forty".