20154129 has 16 divisors (see below), whose sum is σ = 28615680. Its totient is φ = 12573440.

The previous prime is 20154109. The next prime is 20154133. The reversal of 20154129 is 92145102.

It is a cyclic number.

It is not a de Polignac number, because 20154129 - 2⁵ = 20154097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20154099 and 20154108.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8707 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (1788480).

Almost surely, 2^20154129 is an apocalyptic number.

It is an amenable number.

20154129 is a deficient number, since it is larger than the sum of its proper divisors (8461551).

20154129 is a wasteful number, since it uses less digits than its factorization.

20154129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20154129 is about 4489.3350287097. The cubic root of 20154129 is about 272.1372622154.

The spelling of 20154129 in words is "twenty million, one hundred fifty-four thousand, one hundred twenty-nine".