20257154 has 12 divisors (see below), whose sum is σ = 32070294. Its totient is φ = 9595152.

The previous prime is 20257121. The next prime is 20257163. The reversal of 20257154 is 45175202.

It can be written as a sum of positive squares in only one way, i.e., 16999129 + 3258025 = 4123^2 + 1805^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13307 + ... + 14750.

Almost surely, 2^20257154 is an apocalyptic number.

20257154 is a deficient number, since it is larger than the sum of its proper divisors (11813140).

20257154 is a wasteful number, since it uses less digits than its factorization.

20257154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28097 (or 28078 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 20257154 is about 4500.7948186959. The cubic root of 20257154 is about 272.6001831228.

The spelling of 20257154 in words is "twenty million, two hundred fifty-seven thousand, one hundred fifty-four".