20115994 has 8 divisors (see below), whose sum is σ = 30910068. Its totient is φ = 9812640.

The previous prime is 20115989. The next prime is 20116001. The reversal of 20115994 is 49951102.

It can be written as a sum of positive squares in 2 ways, for example, as 19686969 + 429025 = 4437^2 + 655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122577 + ... + 122740.

Almost surely, 2^20115994 is an apocalyptic number.

20115994 is a deficient number, since it is larger than the sum of its proper divisors (10794074).

20115994 is a wasteful number, since it uses less digits than its factorization.

20115994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245360.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 20115994 is about 4485.0857293925. The cubic root of 20115994 is about 271.9655106933.

The spelling of 20115994 in words is "twenty million, one hundred fifteen thousand, nine hundred ninety-four".