21854074 has 8 divisors (see below), whose sum is σ = 35761248. Its totient is φ = 9933660.

The previous prime is 21854059. The next prime is 21854089. The reversal of 21854074 is 47045812.

It is an interprime number because it is at equal distance from previous prime (21854059) and next prime (21854089).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496662 + ... + 496705.

It is an arithmetic number, because the mean of its divisors is an integer number (4470156).

Almost surely, 2^21854074 is an apocalyptic number.

21854074 is a deficient number, since it is larger than the sum of its proper divisors (13907174).

21854074 is a wasteful number, since it uses less digits than its factorization.

21854074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993380.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 21854074 is about 4674.8341147040. The cubic root of 21854074 is about 279.5830273166.

Adding to 21854074 its reverse (47045812), we get a palindrome (68899886).

The spelling of 21854074 in words is "twenty-one million, eight hundred fifty-four thousand, seventy-four".