20495430 has 40 divisors (see below), whose sum is σ = 55112112. Its totient is φ = 5465232.

The previous prime is 20495417. The next prime is 20495441. The reversal of 20495430 is 3459402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20495394 and 20495403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11842 + ... + 13461.

Almost surely, 2^20495430 is an apocalyptic number.

20495430 is an abundant number, since it is smaller than the sum of its proper divisors (34616682).

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

20495430 is a wasteful number, since it uses less digits than its factorization.

20495430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25322 (or 25313 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20495430 is about 4527.1878688652. The cubic root of 20495430 is about 273.6648449718.

The spelling of 20495430 in words is "twenty million, four hundred ninety-five thousand, four hundred thirty".