21390022833 has 8 divisors (see below), whose sum is σ = 28521409728. Its totient is φ = 14259325584.

The previous prime is 21390022831. The next prime is 21390022853. The reversal of 21390022833 is 33822009312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21390022833 - 2¹ = 21390022831 is a prime.

It is a super-2 number, since 2×21390022833² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21390022794 and 21390022803.

It is not an unprimeable number, because it can be changed into a prime (21390022831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95085 + ... + 227642.

It is an arithmetic number, because the mean of its divisors is an integer number (3565176216).

Almost surely, 2^21390022833 is an apocalyptic number.

It is an amenable number.

21390022833 is a deficient number, since it is larger than the sum of its proper divisors (7131386895).

21390022833 is a wasteful number, since it uses less digits than its factorization.

21390022833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344823.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 21390022833 in words is "twenty-one billion, three hundred ninety million, twenty-two thousand, eight hundred thirty-three".