20890372 has 12 divisors (see below), whose sum is σ = 37336320. Its totient is φ = 10222856.

The previous prime is 20890369. The next prime is 20890379. The reversal of 20890372 is 27309802.

It is not an unprimeable number, because it can be changed into a prime (20890379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55372 + ... + 55747.

It is an arithmetic number, because the mean of its divisors is an integer number (3111360).

Almost surely, 2^20890372 is an apocalyptic number.

It is an amenable number.

20890372 is a deficient number, since it is larger than the sum of its proper divisors (16445948).

20890372 is a wasteful number, since it uses less digits than its factorization.

20890372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111170 (or 111168 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20890372 is about 4570.5986478797. The cubic root of 20890372 is about 275.4114919523.

The spelling of 20890372 in words is "twenty million, eight hundred ninety thousand, three hundred seventy-two".