21333000390 has 32 divisors (see below), whose sum is σ = 55137602016. Its totient is φ = 5251200000.

The previous prime is 21333000323. The next prime is 21333000407. The reversal of 21333000390 is 9300033312.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21333000390.

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, 27349611 + ... + 27350390.

It is an arithmetic number, because the mean of its divisors is an integer number (1723050063).

Almost surely, 2^21333000390 is an apocalyptic number.

21333000390 is an abundant number, since it is smaller than the sum of its proper divisors (33804601626).

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

21333000390 is a wasteful number, since it uses less digits than its factorization.

21333000390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54700024.

The product of its (nonzero) digits is 1458, while the sum is 24.

The spelling of 21333000390 in words is "twenty-one billion, three hundred thirty-three million, three hundred ninety", and thus it is an aban number.