22320401640 has 64 divisors (see below), whose sum is σ = 68594420160. Its totient is φ = 5806932480.

The previous prime is 22320401633. The next prime is 22320401647. The reversal of 22320401640 is 4610402322.

It is an interprime number because it is at equal distance from previous prime (22320401633) and next prime (22320401647).

It is a super-3 number, since 3×22320401640³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22320401640.

It is not an unprimeable number, because it can be changed into a prime (22320401647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2263414 + ... + 2273253.

It is an arithmetic number, because the mean of its divisors is an integer number (1071787815).

Almost surely, 2^22320401640 is an apocalyptic number.

22320401640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22320401640 is an abundant number, since it is smaller than the sum of its proper divisors (46274018520).

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

22320401640 is a wasteful number, since it uses less digits than its factorization.

22320401640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536722 (or 4536718 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 22320401640 its reverse (4610402322), we get a palindrome (26930803962).

The spelling of 22320401640 in words is "twenty-two billion, three hundred twenty million, four hundred one thousand, six hundred forty".