21140094 has 16 divisors (see below), whose sum is σ = 42385680. Its totient is φ = 7029120.

The previous prime is 21140089. The next prime is 21140107. The reversal of 21140094 is 49004112.

It is a super-4 number, since 4×21140094⁴ (a number of 30 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21140094.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1659 + ... + 6710.

It is an arithmetic number, because the mean of its divisors is an integer number (2649105).

Almost surely, 2^21140094 is an apocalyptic number.

21140094 is an abundant number, since it is smaller than the sum of its proper divisors (21245586).

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

21140094 is a wasteful number, since it uses less digits than its factorization.

21140094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8795.

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

The square root of 21140094 is about 4597.8357952411. The cubic root of 21140094 is about 276.5045643205.

The spelling of 21140094 in words is "twenty-one million, one hundred forty thousand, ninety-four".