20019066237 has 12 divisors (see below), whose sum is σ = 28918023420. Its totient is φ = 13345308288.

The previous prime is 20019066229. The next prime is 20019066251. The reversal of 20019066237 is 73266091002.

20019066237 is a `hidden beast` number, since 20 + 0 + 1 + 9 + 0 + 6 + 623 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9551934756 + 10467131481 = 97734^2 + 102309^2 .

It is not a de Polignac number, because 20019066237 - 2³ = 20019066229 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019066217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148903 + ... + 249419.

It is an arithmetic number, because the mean of its divisors is an integer number (2409835285).

Almost surely, 2^20019066237 is an apocalyptic number.

It is an amenable number.

20019066237 is a deficient number, since it is larger than the sum of its proper divisors (8898957183).

20019066237 is a wasteful number, since it uses less digits than its factorization.

20019066237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122652 (or 122649 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 20019066237 in words is "twenty billion, nineteen million, sixty-six thousand, two hundred thirty-seven".