21954246 has 16 divisors (see below), whose sum is σ = 45095664. Its totient is φ = 7120224.

The previous prime is 21954241. The next prime is 21954263. The reversal of 21954246 is 64245912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21954241) 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, 49225 + ... + 49668.

It is an arithmetic number, because the mean of its divisors is an integer number (2818479).

Almost surely, 2^21954246 is an apocalyptic number.

21954246 is an abundant number, since it is smaller than the sum of its proper divisors (23141418).

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

21954246 is a wasteful number, since it uses less digits than its factorization.

21954246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98935.

The product of its digits is 17280, while the sum is 33.

The square root of 21954246 is about 4685.5358284832. The cubic root of 21954246 is about 280.0095489941.

It can be divided in two parts, 2195 and 4246, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 21954246 in words is "twenty-one million, nine hundred fifty-four thousand, two hundred forty-six".