21933355158 has 144 divisors (see below), whose sum is σ = 56668182480. Its totient is φ = 6089973120.

The previous prime is 21933355127. The next prime is 21933355189. The reversal of 21933355158 is 85155333912.

21933355158 is a `hidden beast` number, since 2 + 1 + 93 + 3 + 3 + 551 + 5 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (21933355127) and next prime (21933355189).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3932860 + ... + 3938432.

It is an arithmetic number, because the mean of its divisors is an integer number (393529045).

Almost surely, 2^21933355158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21933355158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28334091240).

21933355158 is an abundant number, since it is smaller than the sum of its proper divisors (34734827322).

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

21933355158 is a wasteful number, since it uses less digits than its factorization.

21933355158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755 (or 5741 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The spelling of 21933355158 in words is "twenty-one billion, nine hundred thirty-three million, three hundred fifty-five thousand, one hundred fifty-eight".