21622475340 has 96 divisors (see below), whose sum is σ = 68100553920. Its totient is φ = 5765981760.

The previous prime is 21622475339. The next prime is 21622475341. The reversal of 21622475340 is 4357422612.

21622475340 is a `hidden beast` number, since 21 + 6 + 224 + 75 + 340 = 666.

It is an interprime number because it is at equal distance from previous prime (21622475339) and next prime (21622475341).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21622475295 and 21622475304.

It is not an unprimeable number, because it can be changed into a prime (21622475341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203431 + ... + 290910.

It is an arithmetic number, because the mean of its divisors is an integer number (709380770).

Almost surely, 2^21622475340 is an apocalyptic number.

21622475340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21622475340 is an abundant number, since it is smaller than the sum of its proper divisors (46478078580).

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

21622475340 is an equidigital number, since it uses as much as digits as its factorization.

21622475340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494371 (or 494351 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

Adding to 21622475340 its reverse (4357422612), we get a palindrome (25979897952).

The spelling of 21622475340 in words is "twenty-one billion, six hundred twenty-two million, four hundred seventy-five thousand, three hundred forty".