21669054340 has 24 divisors (see below), whose sum is σ = 45720686592. Its totient is φ = 8626541280.

The previous prime is 21669054311. The next prime is 21669054413. The reversal of 21669054340 is 4345096612.

It is a junction number, because it is equal to n+sod(n) for n = 21669054293 and 21669054302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563204 + ... + 2571643.

It is an arithmetic number, because the mean of its divisors is an integer number (1905028608).

Almost surely, 2^21669054340 is an apocalyptic number.

21669054340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21669054340 is an abundant number, since it is smaller than the sum of its proper divisors (24051632252).

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

21669054340 is a wasteful number, since it uses less digits than its factorization.

21669054340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135067 (or 5135065 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 21669054340 in words is "twenty-one billion, six hundred sixty-nine million, fifty-four thousand, three hundred forty".