20195958 has 16 divisors (see below), whose sum is σ = 40605696. Its totient is φ = 6696360.

The previous prime is 20195957. The next prime is 20195971. The reversal of 20195958 is 85959102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7666 + ... + 9957.

It is an arithmetic number, because the mean of its divisors is an integer number (2537856).

Almost surely, 2^20195958 is an apocalyptic number.

20195958 is an abundant number, since it is smaller than the sum of its proper divisors (20409738).

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

20195958 is a wasteful number, since it uses less digits than its factorization.

20195958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17819.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 20195958 is about 4493.9913217540. The cubic root of 20195958 is about 272.3254017190.

The spelling of 20195958 in words is "twenty million, one hundred ninety-five thousand, nine hundred fifty-eight".