20554636 has 12 divisors (see below), whose sum is σ = 36002512. Its totient is φ = 10268208.

The previous prime is 20554631. The next prime is 20554657. The reversal of 20554636 is 63645502.

It is a super-2 number, since 2×20554636² = 844986122184992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20554598 and 20554607.

It is not an unprimeable number, because it can be changed into a prime (20554631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6961 + ... + 9463.

Almost surely, 2^20554636 is an apocalyptic number.

It is an amenable number.

20554636 is a deficient number, since it is larger than the sum of its proper divisors (15447876).

20554636 is a wasteful number, since it uses less digits than its factorization.

20554636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560 (or 4558 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 20554636 is about 4533.7220911741. The cubic root of 20554636 is about 273.9281073038.

The spelling of 20554636 in words is "twenty million, five hundred fifty-four thousand, six hundred thirty-six".