20456458291 has 12 divisors (see below), whose sum is σ = 20972407680. Its totient is φ = 19951179600.

The previous prime is 20456458247. The next prime is 20456458307. The reversal of 20456458291 is 19285465402.

It is not a de Polignac number, because 20456458291 - 2¹⁵ = 20456425523 is a prime.

It is a super-2 number, since 2×20456458291² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456453291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430830 + ... + 475948.

It is an arithmetic number, because the mean of its divisors is an integer number (1747700640).

Almost surely, 2^20456458291 is an apocalyptic number.

20456458291 is a deficient number, since it is larger than the sum of its proper divisors (515949389).

20456458291 is an equidigital number, since it uses as much as digits as its factorization.

20456458291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45354 (or 45287 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 20456458291 in words is "twenty billion, four hundred fifty-six million, four hundred fifty-eight thousand, two hundred ninety-one".