19955994 has 32 divisors (see below), whose sum is σ = 42534720. Its totient is φ = 6220032.

The previous prime is 19955989. The next prime is 19956043. The reversal of 19955994 is 49955991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17712 + ... + 18804.

It is an arithmetic number, because the mean of its divisors is an integer number (1329210).

Almost surely, 2^19955994 is an apocalyptic number.

19955994 is an abundant number, since it is smaller than the sum of its proper divisors (22578726).

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

19955994 is a wasteful number, since it uses less digits than its factorization.

19955994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294.

The product of its digits is 656100, while the sum is 51.

The square root of 19955994 is about 4467.2132252670. The cubic root of 19955994 is about 271.2425310295.

The spelling of 19955994 in words is "nineteen million, nine hundred fifty-five thousand, nine hundred ninety-four".