21954674 has 16 divisors (see below), whose sum is σ = 37747968. Its totient is φ = 9381312.

The previous prime is 21954643. The next prime is 21954679. The reversal of 21954674 is 47645912.

It is not an unprimeable number, because it can be changed into a prime (21954679) 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, 3002 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (2359248).

Almost surely, 2^21954674 is an apocalyptic number.

21954674 is a deficient number, since it is larger than the sum of its proper divisors (15793294).

21954674 is a wasteful number, since it uses less digits than its factorization.

21954674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649.

The product of its digits is 60480, while the sum is 38.

The square root of 21954674 is about 4685.5815007318. The cubic root of 21954674 is about 280.0113685860.

The spelling of 21954674 in words is "twenty-one million, nine hundred fifty-four thousand, six hundred seventy-four".