19439623037 has 2 divisors, whose sum is σ = 19439623038. Its totient is φ = 19439623036.

The previous prime is 19439623019. The next prime is 19439623057. The reversal of 19439623037 is 73032693491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13798261156 + 5641361881 = 117466^2 + 75109^2 .

It is a cyclic number.

It is not a de Polignac number, because 19439623037 - 2⁶ = 19439622973 is a prime.

It is a super-2 number, since 2×19439623037² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19439622982 and 19439623000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19439623057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9719811518 + 9719811519.

It is an arithmetic number, because the mean of its divisors is an integer number (9719811519).

Almost surely, 2^19439623037 is an apocalyptic number.

It is an amenable number.

19439623037 is a deficient number, since it is larger than the sum of its proper divisors (1).

19439623037 is an equidigital number, since it uses as much as digits as its factorization.

19439623037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 47.

The spelling of 19439623037 in words is "nineteen billion, four hundred thirty-nine million, six hundred twenty-three thousand, thirty-seven".