20712404 has 12 divisors (see below), whose sum is σ = 36757728. Its totient is φ = 10210200.

The previous prime is 20712403. The next prime is 20712431. The reversal of 20712404 is 40421702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20712403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36182 + ... + 36749.

It is an arithmetic number, because the mean of its divisors is an integer number (3063144).

Almost surely, 2^20712404 is an apocalyptic number.

It is an amenable number.

20712404 is a deficient number, since it is larger than the sum of its proper divisors (16045324).

20712404 is a wasteful number, since it uses less digits than its factorization.

20712404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73006 (or 73004 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20712404 is about 4551.0882215136. The cubic root of 20712404 is about 274.6271708011.

The spelling of 20712404 in words is "twenty million, seven hundred twelve thousand, four hundred four".