22437021 has 8 divisors (see below), whose sum is σ = 30028320. Its totient is φ = 14901872.

The previous prime is 22437017. The next prime is 22437047. The reversal of 22437021 is 12073422.

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

It is a cyclic number.

It is not a de Polignac number, because 22437021 - 2² = 22437017 is a prime.

It is a super-2 number, since 2×22437021² = 1006839822708882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22437071) 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, 13095 + ... + 14708.

It is an arithmetic number, because the mean of its divisors is an integer number (3753540).

Almost surely, 2^22437021 is an apocalyptic number.

It is an amenable number.

22437021 is a deficient number, since it is larger than the sum of its proper divisors (7591299).

22437021 is a wasteful number, since it uses less digits than its factorization.

22437021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28075.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22437021 is about 4736.7732687981. The cubic root of 22437021 is about 282.0471602632.

The spelling of 22437021 in words is "twenty-two million, four hundred thirty-seven thousand, twenty-one".