20451722263 has 12 divisors (see below), whose sum is σ = 23818523880. Its totient is φ = 17509604112.

The previous prime is 20451722261. The next prime is 20451722293. The reversal of 20451722263 is 36222715402.

It is not a de Polignac number, because 20451722263 - 2¹ = 20451722261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451722261) 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, 200856 + ... + 285037.

It is an arithmetic number, because the mean of its divisors is an integer number (1984876990).

Almost surely, 2^20451722263 is an apocalyptic number.

20451722263 is a deficient number, since it is larger than the sum of its proper divisors (3366801617).

20451722263 is an equidigital number, since it uses as much as digits as its factorization.

20451722263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486766 (or 486759 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 20451722263 in words is "twenty billion, four hundred fifty-one million, seven hundred twenty-two thousand, two hundred sixty-three".