21677322 has 16 divisors (see below), whose sum is σ = 43497792. Its totient is φ = 7201920.

The previous prime is 21677321. The next prime is 21677333. The reversal of 21677322 is 22377612.

It is a self number, because there is not a number n which added to its sum of digits gives 21677322.

It is not an unprimeable number, because it can be changed into a prime (21677321) 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, 3943 + ... + 7674.

It is an arithmetic number, because the mean of its divisors is an integer number (2718612).

Almost surely, 2^21677322 is an apocalyptic number.

21677322 is an abundant number, since it is smaller than the sum of its proper divisors (21820470).

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

21677322 is a wasteful number, since it uses less digits than its factorization.

21677322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933.

The product of its digits is 7056, while the sum is 30.

The square root of 21677322 is about 4655.8911069740. The cubic root of 21677322 is about 278.8272462492.

The spelling of 21677322 in words is "twenty-one million, six hundred seventy-seven thousand, three hundred twenty-two".