21499848 has 48 divisors (see below), whose sum is σ = 60765120. Its totient is φ = 6854496.

The previous prime is 21499843. The next prime is 21499853. The reversal of 21499848 is 84899412.

It is an interprime number because it is at equal distance from previous prime (21499843) and next prime (21499853).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21499843) 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, 4836 + ... + 8147.

It is an arithmetic number, because the mean of its divisors is an integer number (1265940).

Almost surely, 2^21499848 is an apocalyptic number.

It is an amenable number.

21499848 is an abundant number, since it is smaller than the sum of its proper divisors (39265272).

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

21499848 is a wasteful number, since it uses less digits than its factorization.

21499848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13018 (or 13011 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 21499848 is about 4636.7928571374. The cubic root of 21499848 is about 278.0642330398.

The spelling of 21499848 in words is "twenty-one million, four hundred ninety-nine thousand, eight hundred forty-eight".