20072992 has 24 divisors (see below), whose sum is σ = 39652956. Its totient is φ = 10002432.

The previous prime is 20072989. The next prime is 20072993. The reversal of 20072992 is 29927002.

It can be written as a sum of positive squares in 2 ways, for example, as 20034576 + 38416 = 4476^2 + 196^2 .

It is not an unprimeable number, because it can be changed into a prime (20072993) 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, 10408 + ... + 12184.

Almost surely, 2^20072992 is an apocalyptic number.

It is an amenable number.

20072992 is a deficient number, since it is larger than the sum of its proper divisors (19579964).

20072992 is a wasteful number, since it uses less digits than its factorization.

20072992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20072992 is about 4480.2892763749. The cubic root of 20072992 is about 271.7715787020.

Adding to 20072992 its reverse (29927002), we get a palindrome (49999994).

The spelling of 20072992 in words is "twenty million, seventy-two thousand, nine hundred ninety-two".