20739275 has 12 divisors (see below), whose sum is σ = 25960392. Its totient is φ = 16434240.

The previous prime is 20739253. The next prime is 20739283. The reversal of 20739275 is 57293702.

It is not a de Polignac number, because 20739275 - 2⁶ = 20739211 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1202 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (2163366).

Almost surely, 2^20739275 is an apocalyptic number.

20739275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20739275 is a deficient number, since it is larger than the sum of its proper divisors (5221117).

20739275 is a wasteful number, since it uses less digits than its factorization.

20739275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7870 (or 7865 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20739275 is about 4554.0394157275. The cubic root of 20739275 is about 274.7458809512.

The spelling of 20739275 in words is "twenty million, seven hundred thirty-nine thousand, two hundred seventy-five".