21446053662 has 64 divisors (see below), whose sum is σ = 47958324480. Its totient is φ = 6337228800.

The previous prime is 21446053631. The next prime is 21446053667. The reversal of 21446053662 is 26635064412.

It is a super-2 number, since 2×21446053662² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21446053662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446053667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1813264 + ... + 1825052.

It is an arithmetic number, because the mean of its divisors is an integer number (749348820).

Almost surely, 2^21446053662 is an apocalyptic number.

21446053662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21446053662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23979162240).

21446053662 is an abundant number, since it is smaller than the sum of its proper divisors (26512270818).

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

21446053662 is a wasteful number, since it uses less digits than its factorization.

21446053662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12489.

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 21446053662 in words is "twenty-one billion, four hundred forty-six million, fifty-three thousand, six hundred sixty-two".