31020423437 has 2 divisors, whose sum is σ = 31020423438. Its totient is φ = 31020423436.

The previous prime is 31020423431. The next prime is 31020423461. The reversal of 31020423437 is 73432402013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18326119876 + 12694303561 = 135374^2 + 112669^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020423437 - 2¹⁰ = 31020422413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020423431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510211718 + 15510211719.

It is an arithmetic number, because the mean of its divisors is an integer number (15510211719).

Almost surely, 2^31020423437 is an apocalyptic number.

It is an amenable number.

31020423437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020423437 is an equidigital number, since it uses as much as digits as its factorization.

31020423437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

The spelling of 31020423437 in words is "thirty-one billion, twenty million, four hundred twenty-three thousand, four hundred thirty-seven".