21144209022 has 24 divisors (see below), whose sum is σ = 46217877264. Its totient is φ = 6985696704.

The previous prime is 21144208979. The next prime is 21144209039. The reversal of 21144209022 is 22090244112.

21144209022 is a `hidden beast` number, since 211 + 4 + 420 + 9 + 0 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5195658 + ... + 5199725.

It is an arithmetic number, because the mean of its divisors is an integer number (1925744886).

Almost surely, 2^21144209022 is an apocalyptic number.

21144209022 is an abundant number, since it is smaller than the sum of its proper divisors (25073668242).

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

21144209022 is a wasteful number, since it uses less digits than its factorization.

21144209022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395504 (or 10395501 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 21144209022 in words is "twenty-one billion, one hundred forty-four million, two hundred nine thousand, twenty-two".