20149934 has 32 divisors (see below), whose sum is σ = 35721216. Its totient is φ = 8346240.

The previous prime is 20149933. The next prime is 20149951. The reversal of 20149934 is 43994102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20149934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20149931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74219 + ... + 74489.

It is an arithmetic number, because the mean of its divisors is an integer number (1116288).

Almost surely, 2^20149934 is an apocalyptic number.

20149934 is a deficient number, since it is larger than the sum of its proper divisors (15571282).

20149934 is a wasteful number, since it uses less digits than its factorization.

20149934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20149934 is about 4488.8677859790. The cubic root of 20149934 is about 272.1183794837.

The spelling of 20149934 in words is "twenty million, one hundred forty-nine thousand, nine hundred thirty-four".