21849432 has 32 divisors (see below), whose sum is σ = 59590080. Its totient is φ = 6620960.

The previous prime is 21849427. The next prime is 21849463. The reversal of 21849432 is 23494812.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21849393 and 21849402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41118 + ... + 41645.

It is an arithmetic number, because the mean of its divisors is an integer number (1862190).

Almost surely, 2^21849432 is an apocalyptic number.

21849432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21849432 is an abundant number, since it is smaller than the sum of its proper divisors (37740648).

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

21849432 is a wasteful number, since it uses less digits than its factorization.

21849432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82783 (or 82779 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 21849432 is about 4674.3376001312. The cubic root of 21849432 is about 279.5632306064.

The spelling of 21849432 in words is "twenty-one million, eight hundred forty-nine thousand, four hundred thirty-two".