21946442076 has 144 divisors (see below), whose sum is σ = 62027454720. Its totient is φ = 6707188800.

The previous prime is 21946442069. The next prime is 21946442083. The reversal of 21946442076 is 67024464912.

21946442076 is a `hidden beast` number, since 219 + 4 + 6 + 4 + 420 + 7 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (21946442069) and next prime (21946442083).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2752071 + ... + 2760033.

Almost surely, 2^21946442076 is an apocalyptic number.

21946442076 is a gapful number since it is divisible by the number (26) 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 21946442076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31013727360).

21946442076 is an abundant number, since it is smaller than the sum of its proper divisors (40081012644).

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

21946442076 is a wasteful number, since it uses less digits than its factorization.

21946442076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153 (or 8132 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 21946442076 in words is "twenty-one billion, nine hundred forty-six million, four hundred forty-two thousand, seventy-six".