20657054 has 16 divisors (see below), whose sum is σ = 33872256. Its totient is φ = 9370200.

The previous prime is 20657053. The next prime is 20657069. The reversal of 20657054 is 45075602.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20657051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20789 + ... + 21759.

It is an arithmetic number, because the mean of its divisors is an integer number (2117016).

Almost surely, 2^20657054 is an apocalyptic number.

20657054 is a deficient number, since it is larger than the sum of its proper divisors (13215202).

20657054 is a wasteful number, since it uses less digits than its factorization.

20657054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20657054 is about 4545.0031903179. The cubic root of 20657054 is about 274.3823227654.

Subtracting from 20657054 its sum of digits (29), we obtain a square (20657025 = 4545²).

It can be divided in two parts, 2065 and 7054, that added together give a palindrome (9119).

The spelling of 20657054 in words is "twenty million, six hundred fifty-seven thousand, fifty-four".