20493888 has 28 divisors (see below), whose sum is σ = 54223920. Its totient is φ = 6831232.

The previous prime is 20493877. The next prime is 20493901. The reversal of 20493888 is 88839402.

It is a happy 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, 53178 + ... + 53561.

Almost surely, 2^20493888 is an apocalyptic number.

It is an amenable number.

20493888 is an abundant number, since it is smaller than the sum of its proper divisors (33730032).

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

20493888 is a wasteful number, since it uses less digits than its factorization.

20493888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106754 (or 106744 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 20493888 is about 4527.0175612648. The cubic root of 20493888 is about 273.6579816243.

The spelling of 20493888 in words is "twenty million, four hundred ninety-three thousand, eight hundred eighty-eight".