21454507722 has 32 divisors (see below), whose sum is σ = 45450035712. Its totient is φ = 6728313344.

The previous prime is 21454507703. The next prime is 21454507729. The reversal of 21454507722 is 22770545412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21454507729) 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, 245383 + ... + 321125.

It is an arithmetic number, because the mean of its divisors is an integer number (1420313616).

Almost surely, 2^21454507722 is an apocalyptic number.

21454507722 is an abundant number, since it is smaller than the sum of its proper divisors (23995527990).

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

21454507722 is a wasteful number, since it uses less digits than its factorization.

21454507722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78542.

The product of its (nonzero) digits is 156800, while the sum is 39.

The spelling of 21454507722 in words is "twenty-one billion, four hundred fifty-four million, five hundred seven thousand, seven hundred twenty-two".