21802000022 has 16 divisors (see below), whose sum is σ = 35682764544. Its totient is φ = 9908121000.

The previous prime is 21802000007. The next prime is 21802000037. The reversal of 21802000022 is 22000020812.

It is an interprime number because it is at equal distance from previous prime (21802000007) and next prime (21802000037).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28247 + ... + 210717.

It is an arithmetic number, because the mean of its divisors is an integer number (2230172784).

Almost surely, 2^21802000022 is an apocalyptic number.

21802000022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21802000022 is a deficient number, since it is larger than the sum of its proper divisors (13880764522).

21802000022 is a wasteful number, since it uses less digits than its factorization.

21802000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187915.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21802000022 its reverse (22000020812), we get a palindrome (43802020834).

The spelling of 21802000022 in words is "twenty-one billion, eight hundred two million, twenty-two", and thus it is an aban number.