20625994 has 8 divisors (see below), whose sum is σ = 30968928. Its totient is φ = 10303020.

The previous prime is 20625977. The next prime is 20626007. The reversal of 20625994 is 49952602.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2062 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (3871116).

Almost surely, 2^20625994 is an apocalyptic number.

20625994 is a deficient number, since it is larger than the sum of its proper divisors (10342934).

20625994 is a wasteful number, since it uses less digits than its factorization.

20625994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 20625994 is about 4541.5849656260. The cubic root of 20625994 is about 274.2447331248.

The spelling of 20625994 in words is "twenty million, six hundred twenty-five thousand, nine hundred ninety-four".