20156330 has 8 divisors (see below), whose sum is σ = 36281412. Its totient is φ = 8062528.

The previous prime is 20156329. The next prime is 20156333. The reversal of 20156330 is 3365102.

It can be written as a sum of positive squares in 2 ways, for example, as 18826921 + 1329409 = 4339^2 + 1153^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20156333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007807 + ... + 1007826.

Almost surely, 2^20156330 is an apocalyptic number.

20156330 is a deficient number, since it is larger than the sum of its proper divisors (16125082).

20156330 is a wasteful number, since it uses less digits than its factorization.

20156330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015640.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20156330 is about 4489.5801585449. The cubic root of 20156330 is about 272.1471684123.

The spelling of 20156330 in words is "twenty million, one hundred fifty-six thousand, three hundred thirty".