20694724 has 12 divisors (see below), whose sum is σ = 38122000. Its totient is φ = 9802728.

The previous prime is 20694721. The next prime is 20694731. The reversal of 20694724 is 42749602.

It is a self number, because there is not a number n which added to its sum of digits gives 20694724.

It is not an unprimeable number, because it can be changed into a prime (20694721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136074 + ... + 136225.

Almost surely, 2^20694724 is an apocalyptic number.

It is an amenable number.

20694724 is a deficient number, since it is larger than the sum of its proper divisors (17427276).

20694724 is a wasteful number, since it uses less digits than its factorization.

20694724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272322 (or 272320 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20694724 is about 4549.1454142509. The cubic root of 20694724 is about 274.5490084504.

The spelling of 20694724 in words is "twenty million, six hundred ninety-four thousand, seven hundred twenty-four".