20466240 has 56 divisors (see below), whose sum is σ = 64983360. Its totient is φ = 5457408.

The previous prime is 20466239. The next prime is 20466269. The reversal of 20466240 is 4266402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20466240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9700 + ... + 11619.

Almost surely, 2^20466240 is an apocalyptic number.

20466240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20466240 is an abundant number, since it is smaller than the sum of its proper divisors (44517120).

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

20466240 is a wasteful number, since it uses less digits than its factorization.

20466240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21339 (or 21329 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20466240 is about 4523.9628645691. The cubic root of 20466240 is about 273.5348636022.

It can be divided in two parts, 20466 and 240, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20466240 in words is "twenty million, four hundred sixty-six thousand, two hundred forty".