20034431939 has 2 divisors, whose sum is σ = 20034431940. Its totient is φ = 20034431938.

The previous prime is 20034431899. The next prime is 20034431941. The reversal of 20034431939 is 93913443002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20034431939 - 2¹² = 20034427843 is a prime.

Together with 20034431941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20034431959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10017215969 + 10017215970.

It is an arithmetic number, because the mean of its divisors is an integer number (10017215970).

Almost surely, 2^20034431939 is an apocalyptic number.

20034431939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20034431939 is an equidigital number, since it uses as much as digits as its factorization.

20034431939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 38.

The spelling of 20034431939 in words is "twenty billion, thirty-four million, four hundred thirty-one thousand, nine hundred thirty-nine".