20748254731 has 2 divisors, whose sum is σ = 20748254732. Its totient is φ = 20748254730.

The previous prime is 20748254689. The next prime is 20748254743. The reversal of 20748254731 is 13745284702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20748254731 - 2⁷ = 20748254603 is a prime.

It is a super-2 number, since 2×20748254731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20748252731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374127365 + 10374127366.

It is an arithmetic number, because the mean of its divisors is an integer number (10374127366).

Almost surely, 2^20748254731 is an apocalyptic number.

20748254731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20748254731 is an equidigital number, since it uses as much as digits as its factorization.

20748254731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 43.

The spelling of 20748254731 in words is "twenty billion, seven hundred forty-eight million, two hundred fifty-four thousand, seven hundred thirty-one".