21946832 has 40 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 10662912.

The previous prime is 21946831. The next prime is 21946867. The reversal of 21946832 is 23864912.

It is a junction number, because it is equal to n+sod(n) for n = 21946792 and 21946801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21946831) 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, 122519 + ... + 122697.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^21946832 is an apocalyptic number.

It is an amenable number.

21946832 is a deficient number, since it is larger than the sum of its proper divisors (21800368).

21946832 is a wasteful number, since it uses less digits than its factorization.

21946832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 357 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 21946832 is about 4684.7446034976. The cubic root of 21946832 is about 279.9780254864.

The spelling of 21946832 in words is "twenty-one million, nine hundred forty-six thousand, eight hundred thirty-two".