20712104 has 24 divisors (see below), whose sum is σ = 45176490. Its totient is φ = 8876448.

The previous prime is 20712091. The next prime is 20712113. The reversal of 20712104 is 40121702.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 9604 = 4550^2 + 98^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26027 + ... + 26810.

Almost surely, 2^20712104 is an apocalyptic number.

It is an amenable number.

20712104 is an abundant number, since it is smaller than the sum of its proper divisors (24464386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20712104 is a wasteful number, since it uses less digits than its factorization.

20712104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52857 (or 52846 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20712104 is about 4551.0552622441. The cubic root of 20712104 is about 274.6258448879.

Adding to 20712104 its reverse (40121702), we get a palindrome (60833806).

The spelling of 20712104 in words is "twenty million, seven hundred twelve thousand, one hundred four".