20102972 has 12 divisors (see below), whose sum is σ = 35626080. Its totient is φ = 9924096.

The previous prime is 20102947. The next prime is 20102983. The reversal of 20102972 is 27920102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31493 + ... + 32124.

It is an arithmetic number, because the mean of its divisors is an integer number (2968840).

Almost surely, 2^20102972 is an apocalyptic number.

It is an amenable number.

20102972 is a deficient number, since it is larger than the sum of its proper divisors (15523108).

20102972 is a wasteful number, since it uses less digits than its factorization.

20102972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63700 (or 63698 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20102972 is about 4483.6337941451. The cubic root of 20102972 is about 271.9068128009.

The spelling of 20102972 in words is "twenty million, one hundred two thousand, nine hundred seventy-two".