20430902 has 8 divisors (see below), whose sum is σ = 30755496. Its totient is φ = 10179072.

The previous prime is 20430899. The next prime is 20430911. The reversal of 20430902 is 20903402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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, 17483 + ... + 18614.

It is an arithmetic number, because the mean of its divisors is an integer number (3844437).

Almost surely, 2^20430902 is an apocalyptic number.

20430902 is a deficient number, since it is larger than the sum of its proper divisors (10324594).

20430902 is a wasteful number, since it uses less digits than its factorization.

20430902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36382.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20430902 is about 4520.0555306323. The cubic root of 20430902 is about 273.3773400624.

The spelling of 20430902 in words is "twenty million, four hundred thirty thousand, nine hundred two".