20451722196 has 24 divisors (see below), whose sum is σ = 48142995264. Its totient is φ = 6756910720.

The previous prime is 20451722167. The next prime is 20451722197. The reversal of 20451722196 is 69122715402.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451722197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7539840 + ... + 7542551.

It is an arithmetic number, because the mean of its divisors is an integer number (2005958136).

Almost surely, 2^20451722196 is an apocalyptic number.

It is an amenable number.

20451722196 is an abundant number, since it is smaller than the sum of its proper divisors (27691273068).

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

20451722196 is a wasteful number, since it uses less digits than its factorization.

20451722196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15082511 (or 15082509 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20451722196 in words is "twenty billion, four hundred fifty-one million, seven hundred twenty-two thousand, one hundred ninety-six".