21420082208822 has 32 divisors (see below), whose sum is σ = 35446826028960. Its totient is φ = 9626473486080.

The previous prime is 21420082208807. The next prime is 21420082208843. The reversal of 21420082208822 is 22880228002412.

It is a self number, because there is not a number n which added to its sum of digits gives 21420082208822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36434588 + ... + 37017824.

It is an arithmetic number, because the mean of its divisors is an integer number (1107713313405).

Almost surely, 2^{21420082208822} is an apocalyptic number.

21420082208822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21420082208822 is a deficient number, since it is larger than the sum of its proper divisors (14026743820138).

21420082208822 is a wasteful number, since it uses less digits than its factorization.

21420082208822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602096.

The product of its (nonzero) digits is 131072, while the sum is 41.

The spelling of 21420082208822 in words is "twenty-one trillion, four hundred twenty billion, eighty-two million, two hundred eight thousand, eight hundred twenty-two".