20745124 has 12 divisors (see below), whose sum is σ = 36899548. Its totient is φ = 10202400.

The previous prime is 20745119. The next prime is 20745161. The reversal of 20745124 is 42154702.

It can be written as a sum of positive squares in 2 ways, for example, as 3356224 + 17388900 = 1832^2 + 4170^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42267 + ... + 42754.

Almost surely, 2^20745124 is an apocalyptic number.

It is an amenable number.

20745124 is a deficient number, since it is larger than the sum of its proper divisors (16154424).

20745124 is a wasteful number, since it uses less digits than its factorization.

20745124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85086 (or 85084 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20745124 is about 4554.6815475947. The cubic root of 20745124 is about 274.7717069522.

Adding to 20745124 its reverse (42154702), we get a palindrome (62899826).

The spelling of 20745124 in words is "twenty million, seven hundred forty-five thousand, one hundred twenty-four".