21722454411 has 16 divisors (see below), whose sum is σ = 33173328384. Its totient is φ = 12385664064.

The previous prime is 21722454409. The next prime is 21722454419. The reversal of 21722454411 is 11445422712.

It is not a de Polignac number, because 21722454411 - 2¹ = 21722454409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21722454419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122135 + ... + 1141328.

It is an arithmetic number, because the mean of its divisors is an integer number (2073333024).

Almost surely, 2^21722454411 is an apocalyptic number.

21722454411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21722454411 is a deficient number, since it is larger than the sum of its proper divisors (11450873973).

21722454411 is a wasteful number, since it uses less digits than its factorization.

21722454411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263930.

The product of its digits is 17920, while the sum is 33.

The spelling of 21722454411 in words is "twenty-one billion, seven hundred twenty-two million, four hundred fifty-four thousand, four hundred eleven".