20657150 has 12 divisors (see below), whose sum is σ = 38422392. Its totient is φ = 8262840.

The previous prime is 20657149. The next prime is 20657171. The reversal of 20657150 is 5175602.

It is a super-2 number, since 2×20657150² = 853435692245000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206522 + ... + 206621.

It is an arithmetic number, because the mean of its divisors is an integer number (3201866).

Almost surely, 2^20657150 is an apocalyptic number.

20657150 is a deficient number, since it is larger than the sum of its proper divisors (17765242).

20657150 is a wasteful number, since it uses less digits than its factorization.

20657150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413155 (or 413150 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 20657150 is about 4545.0137513543. The cubic root of 20657150 is about 274.3827478125.

The spelling of 20657150 in words is "twenty million, six hundred fifty-seven thousand, one hundred fifty".