20481606 has 16 divisors (see below), whose sum is σ = 45514800. Its totient is φ = 6827184.

The previous prime is 20481599. The next prime is 20481623. The reversal of 20481606 is 60618402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20481606.

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, 189591 + ... + 189698.

It is an arithmetic number, because the mean of its divisors is an integer number (2844675).

Almost surely, 2^20481606 is an apocalyptic number.

20481606 is an abundant number, since it is smaller than the sum of its proper divisors (25033194).

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

20481606 is a wasteful number, since it uses less digits than its factorization.

20481606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379300 (or 379294 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20481606 is about 4525.6608357233. The cubic root of 20481606 is about 273.6033028995.

It can be divided in two parts, 204 and 81606, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 20481606 in words is "twenty million, four hundred eighty-one thousand, six hundred six".