20749115903 has 2 divisors, whose sum is σ = 20749115904. Its totient is φ = 20749115902.

The previous prime is 20749115887. The next prime is 20749115911. The reversal of 20749115903 is 30951194702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20749115903 - 2⁴ = 20749115887 is a prime.

It is a super-2 number, since 2×20749115903² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20749115963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374557951 + 10374557952.

It is an arithmetic number, because the mean of its divisors is an integer number (10374557952).

Almost surely, 2^20749115903 is an apocalyptic number.

20749115903 is a deficient number, since it is larger than the sum of its proper divisors (1).

20749115903 is an equidigital number, since it uses as much as digits as its factorization.

20749115903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 20749115903 in words is "twenty billion, seven hundred forty-nine million, one hundred fifteen thousand, nine hundred three".