22121582340 has 96 divisors (see below), whose sum is σ = 72769205376. Its totient is φ = 4950282240.

The previous prime is 22121582339. The next prime is 22121582381. The reversal of 22121582340 is 4328512122.

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 = 22121582298 and 22121582307.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1280557 + ... + 1297716.

It is an arithmetic number, because the mean of its divisors is an integer number (758012556).

Almost surely, 2^22121582340 is an apocalyptic number.

22121582340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121582340 is an abundant number, since it is smaller than the sum of its proper divisors (50647623036).

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

22121582340 is a wasteful number, since it uses less digits than its factorization.

22121582340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578309 (or 2578307 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 22121582340 in words is "twenty-two billion, one hundred twenty-one million, five hundred eighty-two thousand, three hundred forty".