20625273 has 20 divisors (see below), whose sum is σ = 32153088. Its totient is φ = 13151160.

The previous prime is 20625271. The next prime is 20625277. The reversal of 20625273 is 37252602.

It is not a de Polignac number, because 20625273 - 2¹ = 20625271 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20625271) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3673 + ... + 7398.

Almost surely, 2^20625273 is an apocalyptic number.

20625273 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20625273 is a deficient number, since it is larger than the sum of its proper divisors (11527815).

20625273 is a wasteful number, since it uses less digits than its factorization.

20625273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11106 (or 11097 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20625273 is about 4541.5055873576. The cubic root of 20625273 is about 274.2415375979.

Adding to 20625273 its reverse (37252602), we get a palindrome (57877875).

The spelling of 20625273 in words is "twenty million, six hundred twenty-five thousand, two hundred seventy-three".