2021623394 has 8 divisors (see below), whose sum is σ = 3465640128. Its totient is φ = 866410020.

The previous prime is 2021623393. The next prime is 2021623397. The reversal of 2021623394 is 4933261202.

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

It is a super-2 number, since 2×2021623394² = 8173922294336158472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021623394.

It is not an unprimeable number, because it can be changed into a prime (2021623393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72200822 + ... + 72200849.

It is an arithmetic number, because the mean of its divisors is an integer number (433205016).

Almost surely, 2^2021623394 is an apocalyptic number.

2021623394 is a deficient number, since it is larger than the sum of its proper divisors (1444016734).

2021623394 is a wasteful number, since it uses less digits than its factorization.

2021623394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144401680.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 2021623394 is about 44962.4665026286. The cubic root of 2021623394 is about 1264.4454117284.

Adding to 2021623394 its reverse (4933261202), we get a palindrome (6954884596).

The spelling of 2021623394 in words is "two billion, twenty-one million, six hundred twenty-three thousand, three hundred ninety-four".