39920537951023 has 2 divisors, whose sum is σ = 39920537951024. Its totient is φ = 39920537951022.

The previous prime is 39920537950967. The next prime is 39920537951027. The reversal of 39920537951023 is 32015973502993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39920537951023 - 2¹⁷ = 39920537819951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39920537951027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19960268975511 + 19960268975512.

It is an arithmetic number, because the mean of its divisors is an integer number (19960268975512).

Almost surely, 2^{39920537951023} is an apocalyptic number.

39920537951023 is a deficient number, since it is larger than the sum of its proper divisors (1).

39920537951023 is an equidigital number, since it uses as much as digits as its factorization.

39920537951023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13778100, while the sum is 58.

The spelling of 39920537951023 in words is "thirty-nine trillion, nine hundred twenty billion, five hundred thirty-seven million, nine hundred fifty-one thousand, twenty-three".