21944469000 has 64 divisors (see below), whose sum is σ = 68466752640. Its totient is φ = 5851857600.

The previous prime is 21944468999. The next prime is 21944469013. The reversal of 21944469000 is 96444912.

It is a super-2 number, since 2×21944469000² (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 21944469000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3654412 + ... + 3660411.

It is an arithmetic number, because the mean of its divisors is an integer number (1069793010).

Almost surely, 2^21944469000 is an apocalyptic number.

21944469000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21944469000 is an abundant number, since it is smaller than the sum of its proper divisors (46522283640).

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

21944469000 is a wasteful number, since it uses less digits than its factorization.

21944469000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314847 (or 7314833 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 21944469000 in words is "twenty-one billion, nine hundred forty-four million, four hundred sixty-nine thousand".