20557154 has 16 divisors (see below), whose sum is σ = 32610816. Its totient is φ = 9703200.

The previous prime is 20557153. The next prime is 20557157. The reversal of 20557154 is 45175502.

It is not an unprimeable number, because it can be changed into a prime (20557153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1502 + ... + 6585.

It is an arithmetic number, because the mean of its divisors is an integer number (2038176).

Almost surely, 2^20557154 is an apocalyptic number.

20557154 is a deficient number, since it is larger than the sum of its proper divisors (12053662).

20557154 is a wasteful number, since it uses less digits than its factorization.

20557154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 20557154 is about 4533.9997794442. Note that the first 3 decimals coincide. The cubic root of 20557154 is about 273.9392924984.

The spelling of 20557154 in words is "twenty million, five hundred fifty-seven thousand, one hundred fifty-four".