22321990 has 8 divisors (see below), whose sum is σ = 40179600. Its totient is φ = 8928792.

The previous prime is 22321961. The next prime is 22321991. The reversal of 22321990 is 9912322.

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

It is a super-3 number, since 3×22321990³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22321991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116090 + ... + 1116109.

It is an arithmetic number, because the mean of its divisors is an integer number (5022450).

Almost surely, 2^22321990 is an apocalyptic number.

22321990 is a deficient number, since it is larger than the sum of its proper divisors (17857610).

22321990 is a wasteful number, since it uses less digits than its factorization.

22321990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232206.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 22321990 is about 4724.6153282569. The cubic root of 22321990 is about 281.5643307067.

The spelling of 22321990 in words is "twenty-two million, three hundred twenty-one thousand, nine hundred ninety".