20019330 has 24 divisors (see below), whose sum is σ = 52050492. Its totient is φ = 5338464.

The previous prime is 20019313. The next prime is 20019341. The reversal of 20019330 is 3391002.

It can be written as a sum of positive squares in 2 ways, for example, as 18378369 + 1640961 = 4287^2 + 1281^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111129 + ... + 111308.

Almost surely, 2^20019330 is an apocalyptic number.

20019330 is an abundant number, since it is smaller than the sum of its proper divisors (32031162).

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

20019330 is a wasteful number, since it uses less digits than its factorization.

20019330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222450 (or 222447 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 20019330 is about 4474.2965927618. The cubic root of 20019330 is about 271.5291829888.

The spelling of 20019330 in words is "twenty million, nineteen thousand, three hundred thirty".