20200231999 has 2 divisors, whose sum is σ = 20200232000. Its totient is φ = 20200231998.

The previous prime is 20200231993. The next prime is 20200232027. The reversal of 20200231999 is 99913200202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200231999 - 2¹⁹ = 20199707711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200231993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100115999 + 10100116000.

It is an arithmetic number, because the mean of its divisors is an integer number (10100116000).

Almost surely, 2^20200231999 is an apocalyptic number.

20200231999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200231999 is an equidigital number, since it uses as much as digits as its factorization.

20200231999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The spelling of 20200231999 in words is "twenty billion, two hundred million, two hundred thirty-one thousand, nine hundred ninety-nine".