20158002 has 24 divisors (see below), whose sum is σ = 43792320. Its totient is φ = 6701400.

The previous prime is 20157983. The next prime is 20158003. The reversal of 20158002 is 20085102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20158003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6627 + ... + 9177.

It is an arithmetic number, because the mean of its divisors is an integer number (1824680).

Almost surely, 2^20158002 is an apocalyptic number.

20158002 is an abundant number, since it is smaller than the sum of its proper divisors (23634318).

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

20158002 is a wasteful number, since it uses less digits than its factorization.

20158002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2995 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20158002 is about 4489.7663636319. The cubic root of 20158002 is about 272.1546932194.

Subtracting from 20158002 its reverse (20085102), we obtain a square (72900 = 270²).

The spelling of 20158002 in words is "twenty million, one hundred fifty-eight thousand, two".