22021404340 has 48 divisors (see below), whose sum is σ = 50136584400. Its totient is φ = 8076395520.

The previous prime is 22021404337. The next prime is 22021404371. The reversal of 22021404340 is 4340412022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9071419536 + 12949984804 = 95244^2 + 113798^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245481 + ... + 322960.

It is an arithmetic number, because the mean of its divisors is an integer number (1044512175).

Almost surely, 2^22021404340 is an apocalyptic number.

22021404340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021404340 is an abundant number, since it is smaller than the sum of its proper divisors (28115180060).

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

22021404340 is a wasteful number, since it uses less digits than its factorization.

22021404340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568612 (or 568610 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 22021404340 its reverse (4340412022), we get a palindrome (26361816362).

The spelling of 22021404340 in words is "twenty-two billion, twenty-one million, four hundred four thousand, three hundred forty".