21146263422 has 16 divisors (see below), whose sum is σ = 42294152592. Its totient is φ = 7048483520.

The previous prime is 21146263403. The next prime is 21146263423. The reversal of 21146263422 is 22436264112.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146263423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160522 + ... + 260882.

It is an arithmetic number, because the mean of its divisors is an integer number (2643384537).

Almost surely, 2^21146263422 is an apocalyptic number.

21146263422 is an abundant number, since it is smaller than the sum of its proper divisors (21147889170).

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

21146263422 is a wasteful number, since it uses less digits than its factorization.

21146263422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135483.

The product of its digits is 27648, while the sum is 33.

The spelling of 21146263422 in words is "twenty-one billion, one hundred forty-six million, two hundred sixty-three thousand, four hundred twenty-two".