20020972 has 18 divisors (see below), whose sum is σ = 35883708. Its totient is φ = 9774072.

The previous prime is 20020943. The next prime is 20021021. The reversal of 20020972 is 27902002.

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, 6043 + ... + 8749.

Almost surely, 2^20020972 is an apocalyptic number.

It is an amenable number.

20020972 is a deficient number, since it is larger than the sum of its proper divisors (15862736).

20020972 is a wasteful number, since it uses less digits than its factorization.

20020972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20020972 is about 4474.4800815290. The cubic root of 20020972 is about 271.5366064596.

Adding to 20020972 its reverse (27902002), we get a palindrome (47922974).

The spelling of 20020972 in words is "twenty million, twenty thousand, nine hundred seventy-two".