20154159 has 24 divisors (see below), whose sum is σ = 30944160. Its totient is φ = 12616128.

The previous prime is 20154149. The next prime is 20154179. The reversal of 20154159 is 95145102.

It is not a de Polignac number, because 20154159 - 2¹² = 20150063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8614 + ... + 10700.

It is an arithmetic number, because the mean of its divisors is an integer number (1289340).

Almost surely, 2^20154159 is an apocalyptic number.

20154159 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20154159 is a deficient number, since it is larger than the sum of its proper divisors (10790001).

20154159 is a wasteful number, since it uses less digits than its factorization.

20154159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 20154159 is about 4489.3383699605. The cubic root of 20154159 is about 272.1373972434.

The spelling of 20154159 in words is "twenty million, one hundred fifty-four thousand, one hundred fifty-nine".