20492885 has 16 divisors (see below), whose sum is σ = 29327616. Its totient is φ = 13440768.

The previous prime is 20492863. The next prime is 20492911. The reversal of 20492885 is 58829402.

It is a cyclic number.

It is not a de Polignac number, because 20492885 - 2⁸ = 20492629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11924 + ... + 13533.

It is an arithmetic number, because the mean of its divisors is an integer number (1832976).

Almost surely, 2^20492885 is an apocalyptic number.

It is an amenable number.

20492885 is a deficient number, since it is larger than the sum of its proper divisors (8834731).

20492885 is a wasteful number, since it uses less digits than its factorization.

20492885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25492.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 20492885 is about 4526.9067805732. The cubic root of 20492885 is about 273.6535171479.

The spelling of 20492885 in words is "twenty million, four hundred ninety-two thousand, eight hundred eighty-five".