20377858993 has 2 divisors, whose sum is σ = 20377858994. Its totient is φ = 20377858992.

The previous prime is 20377858961. The next prime is 20377859009. The reversal of 20377858993 is 39985877302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15812559504 + 4565299489 = 125748^2 + 67567^2 .

It is a cyclic number.

It is not a de Polignac number, because 20377858993 - 2⁵ = 20377858961 is a prime.

It is not a weakly prime, because it can be changed into another prime (20377852993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10188929496 + 10188929497.

It is an arithmetic number, because the mean of its divisors is an integer number (10188929497).

Almost surely, 2^20377858993 is an apocalyptic number.

It is an amenable number.

20377858993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20377858993 is an equidigital number, since it uses as much as digits as its factorization.

20377858993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 20377858993 in words is "twenty billion, three hundred seventy-seven million, eight hundred fifty-eight thousand, nine hundred ninety-three".