22020381 has 12 divisors (see below), whose sum is σ = 32210880. Its totient is φ = 14493960.

The previous prime is 22020379. The next prime is 22020391. The reversal of 22020381 is 18302022.

It is a happy number.

It is not a de Polignac number, because 22020381 - 2¹ = 22020379 is a prime.

It is a super-2 number, since 2×22020381² = 969794358770322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14775 + ... + 16196.

It is an arithmetic number, because the mean of its divisors is an integer number (2684240).

Almost surely, 2^22020381 is an apocalyptic number.

It is an amenable number.

22020381 is a deficient number, since it is larger than the sum of its proper divisors (10190499).

22020381 is a wasteful number, since it uses less digits than its factorization.

22020381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31056 (or 31053 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22020381 is about 4692.5878787722. The cubic root of 22020381 is about 280.2904341829.

The spelling of 22020381 in words is "twenty-two million, twenty thousand, three hundred eighty-one".