20155425 has 24 divisors (see below), whose sum is σ = 34402560. Its totient is φ = 10401600.

The previous prime is 20155411. The next prime is 20155427. The reversal of 20155425 is 52455102.

It is a happy number.

It is not a de Polignac number, because 20155425 - 2⁸ = 20155169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20155395 and 20155404.

It is not an unprimeable number, because it can be changed into a prime (20155427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2010 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (1433440).

Almost surely, 2^20155425 is an apocalyptic number.

20155425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20155425 is a deficient number, since it is larger than the sum of its proper divisors (14247135).

20155425 is a wasteful number, since it uses less digits than its factorization.

20155425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8713 (or 8708 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20155425 is about 4489.4793684792. The cubic root of 20155425 is about 272.1430953019.

The spelling of 20155425 in words is "twenty million, one hundred fifty-five thousand, four hundred twenty-five".