20158425 has 36 divisors (see below), whose sum is σ = 41267200. Its totient is φ = 9214560.

The previous prime is 20158423. The next prime is 20158427. The reversal of 20158425 is 52485102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20158423) and next prime (20158427).

It is not a de Polignac number, because 20158425 - 2¹ = 20158423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20158421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4825 + ... + 7974.

Almost surely, 2^20158425 is an apocalyptic number.

20158425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20158425 is an abundant number, since it is smaller than the sum of its proper divisors (21108775).

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

20158425 is a wasteful number, since it uses less digits than its factorization.

20158425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822 (or 12814 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 20158425 is about 4489.8134705130. The cubic root of 20158425 is about 272.1565968576.

It can be divided in two parts, 2015 and 8425, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 20158425 in words is "twenty million, one hundred fifty-eight thousand, four hundred twenty-five".