20677225 has 24 divisors (see below), whose sum is σ = 27319680. Its totient is φ = 15480000.

The previous prime is 20677213. The next prime is 20677247. The reversal of 20677225 is 52277602.

It is a de Polignac number, because none of the positive numbers 2^k-20677225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47760 + ... + 48190.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^20677225 is an apocalyptic number.

20677225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20677225 is a deficient number, since it is larger than the sum of its proper divisors (6642455).

20677225 is a wasteful number, since it uses less digits than its factorization.

20677225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20677225 is about 4547.2216792235. The cubic root of 20677225 is about 274.4716024430.

It can be divided in two parts, 20677 and 225, that added together give a palindrome (20902).

The spelling of 20677225 in words is "twenty million, six hundred seventy-seven thousand, two hundred twenty-five".