21862986992 has 120 divisors (see below), whose sum is σ = 54899700480. Its totient is φ = 8336657280.

The previous prime is 21862986989. The next prime is 21862986997. The reversal of 21862986992 is 29968926812.

It is a super-2 number, since 2×21862986992² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21862986997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378359 + ... + 432297.

It is an arithmetic number, because the mean of its divisors is an integer number (457497504).

Almost surely, 2^21862986992 is an apocalyptic number.

21862986992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21862986992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27449850240).

21862986992 is an abundant number, since it is smaller than the sum of its proper divisors (33036713488).

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

21862986992 is a wasteful number, since it uses less digits than its factorization.

21862986992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54019 (or 54006 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 62.

The spelling of 21862986992 in words is "twenty-one billion, eight hundred sixty-two million, nine hundred eighty-six thousand, nine hundred ninety-two".