21222673140 has 24 divisors (see below), whose sum is σ = 59423484960. Its totient is φ = 5659379488.

The previous prime is 21222673127. The next prime is 21222673169. The reversal of 21222673140 is 4137622212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21222673098 and 21222673107.

It is a congruent number.

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, 176855550 + ... + 176855669.

It is an arithmetic number, because the mean of its divisors is an integer number (2475978540).

Almost surely, 2^21222673140 is an apocalyptic number.

21222673140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222673140 is an abundant number, since it is smaller than the sum of its proper divisors (38200811820).

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

21222673140 is a wasteful number, since it uses less digits than its factorization.

21222673140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353711231 (or 353711229 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 21222673140 in words is "twenty-one billion, two hundred twenty-two million, six hundred seventy-three thousand, one hundred forty".