21469442140 has 48 divisors (see below), whose sum is σ = 45265651200. Its totient is φ = 8553588032.

The previous prime is 21469442129. The next prime is 21469442149. The reversal of 21469442140 is 4124496412.

It is a self number, because there is not a number n which added to its sum of digits gives 21469442140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21469442149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9469287 + ... + 9471553.

It is an arithmetic number, because the mean of its divisors is an integer number (943034400).

Almost surely, 2^21469442140 is an apocalyptic number.

21469442140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21469442140 is an abundant number, since it is smaller than the sum of its proper divisors (23796209060).

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

21469442140 is a wasteful number, since it uses less digits than its factorization.

21469442140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954 (or 3952 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 21469442140 in words is "twenty-one billion, four hundred sixty-nine million, four hundred forty-two thousand, one hundred forty".