21622140643740 has 192 divisors, whose sum is σ = 75049292129280. Its totient is φ = 4529213521920.

The previous prime is 21622140643711. The next prime is 21622140643801. The reversal of 21622140643740 is 4734604122612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 21622140643692 and 21622140643701.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 13486021 + ... + 15003900.

It is an arithmetic number, because the mean of its divisors is an integer number (390881729840).

Almost surely, 2^{21622140643740} is an apocalyptic number.

21622140643740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21622140643740 is an abundant number, since it is smaller than the sum of its proper divisors (53427151485540).

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

21622140643740 is a wasteful number, since it uses less digits than its factorization.

21622140643740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28490092 (or 28490090 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 21622140643740 in words is "twenty-one trillion, six hundred twenty-two billion, one hundred forty million, six hundred forty-three thousand, seven hundred forty".