29720719031 has 2 divisors, whose sum is σ = 29720719032. Its totient is φ = 29720719030.

The previous prime is 29720719027. The next prime is 29720719033. The reversal of 29720719031 is 13091702792.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29720719031 - 2² = 29720719027 is a prime.

It is a super-2 number, since 2×29720719031² (a number of 22 digits) contains 22 as substring.

Together with 29720719033, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29720719031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29720719033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14860359515 + 14860359516.

It is an arithmetic number, because the mean of its divisors is an integer number (14860359516).

Almost surely, 2^29720719031 is an apocalyptic number.

29720719031 is a deficient number, since it is larger than the sum of its proper divisors (1).

29720719031 is an equidigital number, since it uses as much as digits as its factorization.

29720719031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 29720719031 in words is "twenty-nine billion, seven hundred twenty million, seven hundred nineteen thousand, thirty-one".