20478532199 has 2 divisors, whose sum is σ = 20478532200. Its totient is φ = 20478532198.

The previous prime is 20478532189. The next prime is 20478532279. The reversal of 20478532199 is 99123587402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20478532199 - 2⁴ = 20478532183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20478532189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10239266099 + 10239266100.

It is an arithmetic number, because the mean of its divisors is an integer number (10239266100).

Almost surely, 2^20478532199 is an apocalyptic number.

20478532199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20478532199 is an equidigital number, since it uses as much as digits as its factorization.

20478532199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 20478532199 in words is "twenty billion, four hundred seventy-eight million, five hundred thirty-two thousand, one hundred ninety-nine".