20002158 has 24 divisors (see below), whose sum is σ = 47278296. Its totient is φ = 6061200.

The previous prime is 20002133. The next prime is 20002159. The reversal of 20002158 is 85120002.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20002158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50313 + ... + 50708.

It is an arithmetic number, because the mean of its divisors is an integer number (1969929).

Almost surely, 2^20002158 is an apocalyptic number.

20002158 is an abundant number, since it is smaller than the sum of its proper divisors (27276138).

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

20002158 is a wasteful number, since it uses less digits than its factorization.

20002158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101040 (or 101037 counting only the distinct ones).

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

The square root of 20002158 is about 4472.3772202264. The cubic root of 20002158 is about 271.4515241637.

The spelling of 20002158 in words is "twenty million, two thousand, one hundred fifty-eight".