21401094 has 32 divisors (see below), whose sum is σ = 50287104. Its totient is φ = 5986080.

The previous prime is 21401089. The next prime is 21401111. The reversal of 21401094 is 49010412.

It is a self number, because there is not a number n which added to its sum of digits gives 21401094.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11614 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (1571472).

Almost surely, 2^21401094 is an apocalyptic number.

21401094 is an abundant number, since it is smaller than the sum of its proper divisors (28886010).

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

21401094 is a wasteful number, since it uses less digits than its factorization.

21401094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24972.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21401094 is about 4626.1316453383. The cubic root of 21401094 is about 277.6378407805.

The spelling of 21401094 in words is "twenty-one million, four hundred one thousand, ninety-four".