21422466390 has 32 divisors (see below), whose sum is σ = 55368837216. Its totient is φ = 5273222400.

The previous prime is 21422466371. The next prime is 21422466397. The reversal of 21422466390 is 9366422412.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422466397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27464311 + ... + 27465090.

It is an arithmetic number, because the mean of its divisors is an integer number (1730276163).

Almost surely, 2^21422466390 is an apocalyptic number.

21422466390 is an abundant number, since it is smaller than the sum of its proper divisors (33946370826).

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

21422466390 is a wasteful number, since it uses less digits than its factorization.

21422466390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54929424.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 21422466390 in words is "twenty-one billion, four hundred twenty-two million, four hundred sixty-six thousand, three hundred ninety".