20451722262 has 64 divisors (see below), whose sum is σ = 44009360640. Its totient is φ = 6312784896.

The previous prime is 20451722261. The next prime is 20451722293. The reversal of 20451722262 is 26222715402.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8602818 + ... + 8605194.

It is an arithmetic number, because the mean of its divisors is an integer number (687646260).

Almost surely, 2^20451722262 is an apocalyptic number.

20451722262 is an abundant number, since it is smaller than the sum of its proper divisors (23557638378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20451722262 is a wasteful number, since it uses less digits than its factorization.

20451722262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725.

The product of its (nonzero) digits is 26880, while the sum is 33.

The spelling of 20451722262 in words is "twenty billion, four hundred fifty-one million, seven hundred twenty-two thousand, two hundred sixty-two".