21932146 has 8 divisors (see below), whose sum is σ = 33116544. Its totient is φ = 10893300.

The previous prime is 21932143. The next prime is 21932147. The reversal of 21932146 is 64123912.

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

It is not an unprimeable number, because it can be changed into a prime (21932143) 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, 36010 + ... + 36613.

It is an arithmetic number, because the mean of its divisors is an integer number (4139568).

Almost surely, 2^21932146 is an apocalyptic number.

21932146 is a deficient number, since it is larger than the sum of its proper divisors (11184398).

21932146 is a wasteful number, since it uses less digits than its factorization.

21932146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72776.

The product of its digits is 2592, while the sum is 28.

The square root of 21932146 is about 4683.1769131648. The cubic root of 21932146 is about 279.9155612733.

The spelling of 21932146 in words is "twenty-one million, nine hundred thirty-two thousand, one hundred forty-six".