21892254 has 16 divisors (see below), whose sum is σ = 43839360. Its totient is φ = 7288280.

The previous prime is 21892253. The next prime is 21892267. The reversal of 21892254 is 45229812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21892253) 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, 4417 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (2739960).

Almost surely, 2^21892254 is an apocalyptic number.

21892254 is an abundant number, since it is smaller than the sum of its proper divisors (21947106).

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

21892254 is a wasteful number, since it uses less digits than its factorization.

21892254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575.

The product of its digits is 11520, while the sum is 33.

The square root of 21892254 is about 4678.9159000777. The cubic root of 21892254 is about 279.7457470877.

The spelling of 21892254 in words is "twenty-one million, eight hundred ninety-two thousand, two hundred fifty-four".