21848019 has 16 divisors (see below), whose sum is σ = 30141600. Its totient is φ = 14065920.

The previous prime is 21847993. The next prime is 21848023. The reversal of 21848019 is 91084812.

It is not a de Polignac number, because 21848019 - 2¹² = 21843923 is a prime.

It is a super-2 number, since 2×21848019² = 954671868448722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21848089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15879 + ... + 17199.

It is an arithmetic number, because the mean of its divisors is an integer number (1883850).

Almost surely, 2^21848019 is an apocalyptic number.

21848019 is a deficient number, since it is larger than the sum of its proper divisors (8293581).

21848019 is a wasteful number, since it uses less digits than its factorization.

21848019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 21848019 is about 4674.1864532772. The cubic root of 21848019 is about 279.5572040369.

The spelling of 21848019 in words is "twenty-one million, eight hundred forty-eight thousand, nineteen".