22021012340 has 12 divisors (see below), whose sum is σ = 46244125956. Its totient is φ = 8808404928.

The previous prime is 22021012309. The next prime is 22021012399. The reversal of 22021012340 is 4321012022.

It can be written as a sum of positive squares in 2 ways, for example, as 11836569616 + 10184442724 = 108796^2 + 100918^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550525289 + ... + 550525328.

It is an arithmetic number, because the mean of its divisors is an integer number (3853677163).

Almost surely, 2^22021012340 is an apocalyptic number.

22021012340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021012340 is an abundant number, since it is smaller than the sum of its proper divisors (24223113616).

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

22021012340 is a wasteful number, since it uses less digits than its factorization.

22021012340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101050626 (or 1101050624 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22021012340 its reverse (4321012022), we get a palindrome (26342024362).

The spelling of 22021012340 in words is "twenty-two billion, twenty-one million, twelve thousand, three hundred forty".