20195964 has 36 divisors (see below), whose sum is σ = 51214800. Its totient is φ = 6710400.

The previous prime is 20195957. The next prime is 20195971. The reversal of 20195964 is 46959102.

It is an interprime number because it is at equal distance from previous prime (20195957) and next prime (20195971).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13737 + ... + 15135.

Almost surely, 2^20195964 is an apocalyptic number.

It is an amenable number.

20195964 is an abundant number, since it is smaller than the sum of its proper divisors (31018836).

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

20195964 is a wasteful number, since it uses less digits than its factorization.

20195964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20195964 is about 4493.9919893120. The cubic root of 20195964 is about 272.3254286873.

The spelling of 20195964 in words is "twenty million, one hundred ninety-five thousand, nine hundred sixty-four".