20375406 has 24 divisors (see below), whose sum is σ = 44320224. Its totient is φ = 6765120.

The previous prime is 20375389. The next prime is 20375413. The reversal of 20375406 is 60457302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20375406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2790 + ... + 6966.

It is an arithmetic number, because the mean of its divisors is an integer number (1846676).

Almost surely, 2^20375406 is an apocalyptic number.

20375406 is an abundant number, since it is smaller than the sum of its proper divisors (23944818).

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

20375406 is a wasteful number, since it uses less digits than its factorization.

20375406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 4453 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20375406 is about 4513.9124936135. The cubic root of 20375406 is about 273.1295927014.

The spelling of 20375406 in words is "twenty million, three hundred seventy-five thousand, four hundred six".