21421022193 has 24 divisors (see below), whose sum is σ = 34185984768. Its totient is φ = 12856263552.

The previous prime is 21421022179. The next prime is 21421022219. The reversal of 21421022193 is 39122012412.

21421022193 is a `hidden beast` number, since 21 + 421 + 0 + 2 + 219 + 3 = 666.

It is not a de Polignac number, because 21421022193 - 2¹³ = 21421014001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21421022113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3040105 + ... + 3047142.

It is an arithmetic number, because the mean of its divisors is an integer number (1424416032).

Almost surely, 2^21421022193 is an apocalyptic number.

21421022193 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21421022193 is a deficient number, since it is larger than the sum of its proper divisors (12764962575).

21421022193 is a wasteful number, since it uses less digits than its factorization.

21421022193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6087293 (or 6087290 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21421022193 in words is "twenty-one billion, four hundred twenty-one million, twenty-two thousand, one hundred ninety-three".