21669054342 has 32 divisors (see below), whose sum is σ = 46788265440. Its totient is φ = 6650764800.

The previous prime is 21669054311. The next prime is 21669054413. The reversal of 21669054342 is 24345096612.

It is a junction number, because it is equal to n+sod(n) for n = 21669054294 and 21669054303.

It is a congruent number.

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, 315117 + ... + 377672.

It is an arithmetic number, because the mean of its divisors is an integer number (1462133295).

Almost surely, 2^21669054342 is an apocalyptic number.

21669054342 is an abundant number, since it is smaller than the sum of its proper divisors (25119211098).

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

21669054342 is a wasteful number, since it uses less digits than its factorization.

21669054342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693208.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 21669054342 in words is "twenty-one billion, six hundred sixty-nine million, fifty-four thousand, three hundred forty-two".