20149994 has 16 divisors (see below), whose sum is σ = 31905600. Its totient is φ = 9517824.

The previous prime is 20149973. The next prime is 20150021. The reversal of 20149994 is 49994102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21467 + ... + 22385.

It is an arithmetic number, because the mean of its divisors is an integer number (1994100).

Almost surely, 2^20149994 is an apocalyptic number.

20149994 is a deficient number, since it is larger than the sum of its proper divisors (11755606).

20149994 is a wasteful number, since it uses less digits than its factorization.

20149994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 20149994 is about 4488.8744691738. The cubic root of 20149994 is about 272.1186495770.

The spelling of 20149994 in words is "twenty million, one hundred forty-nine thousand, nine hundred ninety-four".