20466636 has 24 divisors (see below), whose sum is σ = 47926704. Its totient is φ = 6797760.

The previous prime is 20466631. The next prime is 20466637. The reversal of 20466636 is 63666402.

20466636 = 1504² + 1505² + ... + 1512².

It is a junction number, because it is equal to n+sod(n) for n = 20466597 and 20466606.

It is not an unprimeable number, because it can be changed into a prime (20466631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (1996946).

Almost surely, 2^20466636 is an apocalyptic number.

It is an amenable number.

20466636 is an abundant number, since it is smaller than the sum of its proper divisors (27460068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20466636 is a wasteful number, since it uses less digits than its factorization.

20466636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121 (or 6119 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 20466636 is about 4524.0066312949. The cubic root of 20466636 is about 273.5366277938.

The spelling of 20466636 in words is "twenty million, four hundred sixty-six thousand, six hundred thirty-six".