21830692 has 12 divisors (see below), whose sum is σ = 41142556. Its totient is φ = 10075680.

The previous prime is 21830689. The next prime is 21830719. The reversal of 21830692 is 29603812.

It can be written as a sum of positive squares in 2 ways, for example, as 6022116 + 15808576 = 2454^2 + 3976^2 .

It is a super-2 number, since 2×21830692² = 953158226397728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209859 + ... + 209962.

Almost surely, 2^21830692 is an apocalyptic number.

It is an amenable number.

21830692 is a deficient number, since it is larger than the sum of its proper divisors (19311864).

21830692 is a wasteful number, since it uses less digits than its factorization.

21830692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419838 (or 419836 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21830692 is about 4672.3326080235. The cubic root of 21830692 is about 279.4832817169.

It can be divided in two parts, 21830 and 692, that added together give a palindrome (22522).

The spelling of 21830692 in words is "twenty-one million, eight hundred thirty thousand, six hundred ninety-two".