20442684 has 12 divisors (see below), whose sum is σ = 47699624. Its totient is φ = 6814224.

The previous prime is 20442661. The next prime is 20442691. The reversal of 20442684 is 48624402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851767 + ... + 851790.

Almost surely, 2^20442684 is an apocalyptic number.

It is an amenable number.

20442684 is an abundant number, since it is smaller than the sum of its proper divisors (27256940).

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

20442684 is a wasteful number, since it uses less digits than its factorization.

20442684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703564 (or 1703562 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 20442684 is about 4521.3586453631. The cubic root of 20442684 is about 273.4298799662.

The spelling of 20442684 in words is "twenty million, four hundred forty-two thousand, six hundred eighty-four".