20149023 has 16 divisors (see below), whose sum is σ = 27305600. Its totient is φ = 13214880.

The previous prime is 20149021. The next prime is 20149027. The reversal of 20149023 is 32094102.

It is not a de Polignac number, because 20149023 - 2¹ = 20149021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20149021) 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, 87873 + ... + 88101.

It is an arithmetic number, because the mean of its divisors is an integer number (1706600).

Almost surely, 2^20149023 is an apocalyptic number.

20149023 is a deficient number, since it is larger than the sum of its proper divisors (7156577).

20149023 is a wasteful number, since it uses less digits than its factorization.

20149023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20149023 is about 4488.7663115827. The cubic root of 20149023 is about 272.1142785012.

The spelling of 20149023 in words is "twenty million, one hundred forty-nine thousand, twenty-three".