20542684 has 6 divisors (see below), whose sum is σ = 35949704. Its totient is φ = 10271340.

The previous prime is 20542673. The next prime is 20542729. The reversal of 20542684 is 48624502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2567832 + ... + 2567839.

Almost surely, 2^20542684 is an apocalyptic number.

It is an amenable number.

20542684 is a deficient number, since it is larger than the sum of its proper divisors (15407020).

20542684 is a wasteful number, since it uses less digits than its factorization.

20542684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135675 (or 5135673 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20542684 is about 4532.4037772467. The cubic root of 20542684 is about 273.8750029251.

The spelling of 20542684 in words is "twenty million, five hundred forty-two thousand, six hundred eighty-four".