21273022 has 16 divisors (see below), whose sum is σ = 33426432. Its totient is φ = 10134520.

The previous prime is 21273019. The next prime is 21273023. The reversal of 21273022 is 22037212.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21273023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13563 + ... + 15049.

It is an arithmetic number, because the mean of its divisors is an integer number (2089152).

Almost surely, 2^21273022 is an apocalyptic number.

21273022 is a deficient number, since it is larger than the sum of its proper divisors (12153410).

21273022 is a wasteful number, since it uses less digits than its factorization.

21273022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 21273022 is about 4612.2686391840. The cubic root of 21273022 is about 277.0829034133.

The spelling of 21273022 in words is "twenty-one million, two hundred seventy-three thousand, twenty-two".