20149738 has 8 divisors (see below), whose sum is σ = 34542432. Its totient is φ = 8635596.

The previous prime is 20149733. The next prime is 20149741. The reversal of 20149738 is 83794102.

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

It is not an unprimeable number, because it can be changed into a prime (20149733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719620 + ... + 719647.

It is an arithmetic number, because the mean of its divisors is an integer number (4317804).

Almost surely, 2^20149738 is an apocalyptic number.

20149738 is a deficient number, since it is larger than the sum of its proper divisors (14392694).

20149738 is a wasteful number, since it uses less digits than its factorization.

20149738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439276.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20149738 is about 4488.8459541401. The cubic root of 20149738 is about 272.1174971752.

The spelling of 20149738 in words is "twenty million, one hundred forty-nine thousand, seven hundred thirty-eight".