20972102 has 4 divisors (see below), whose sum is σ = 31458156. Its totient is φ = 10486050.

The previous prime is 20972099. The next prime is 20972111. The reversal of 20972102 is 20127902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20127902 = 2 ⋅10063951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5243024 + ... + 5243027.

It is an arithmetic number, because the mean of its divisors is an integer number (7864539).

Almost surely, 2^20972102 is an apocalyptic number.

20972102 is a deficient number, since it is larger than the sum of its proper divisors (10486054).

20972102 is a wasteful number, since it uses less digits than its factorization.

20972102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10486053.

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

The square root of 20972102 is about 4579.5307619886. The cubic root of 20972102 is about 275.7701913279.

The spelling of 20972102 in words is "twenty million, nine hundred seventy-two thousand, one hundred two".