20228637 has 32 divisors (see below), whose sum is σ = 32247936. Its totient is φ = 11116800.

The previous prime is 20228587. The next prime is 20228639. The reversal of 20228637 is 73682202.

It is not a de Polignac number, because 20228637 - 2¹¹ = 20226589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25783 + ... + 26555.

It is an arithmetic number, because the mean of its divisors is an integer number (1007748).

Almost surely, 2^20228637 is an apocalyptic number.

It is an amenable number.

20228637 is a deficient number, since it is larger than the sum of its proper divisors (12019299).

20228637 is a wasteful number, since it uses less digits than its factorization.

20228637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20228637 is about 4497.6257069703. The cubic root of 20228637 is about 272.4722054528.

The spelling of 20228637 in words is "twenty million, two hundred twenty-eight thousand, six hundred thirty-seven".