21793254 has 32 divisors (see below), whose sum is σ = 50184960. Its totient is φ = 6180192.

The previous prime is 21793253. The next prime is 21793283. The reversal of 21793254 is 45239712.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21793253) 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, 3972 + ... + 7704.

It is an arithmetic number, because the mean of its divisors is an integer number (1568280).

Almost surely, 2^21793254 is an apocalyptic number.

21793254 is an abundant number, since it is smaller than the sum of its proper divisors (28391706).

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

21793254 is a wasteful number, since it uses less digits than its factorization.

21793254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884.

The product of its digits is 15120, while the sum is 33.

The square root of 21793254 is about 4668.3245388469. The cubic root of 21793254 is about 279.3234260107.

The spelling of 21793254 in words is "twenty-one million, seven hundred ninety-three thousand, two hundred fifty-four".