21698094 has 32 divisors (see below), whose sum is σ = 48242304. Its totient is φ = 6450080.

The previous prime is 21698081. The next prime is 21698107. The reversal of 21698094 is 49089612.

It is an interprime number because it is at equal distance from previous prime (21698081) and next prime (21698107).

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, 397 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (1507572).

Almost surely, 2^21698094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21698094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24121152).

21698094 is an abundant number, since it is smaller than the sum of its proper divisors (26544210).

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

21698094 is a wasteful number, since it uses less digits than its factorization.

21698094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6272.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 21698094 is about 4658.1212951146. The cubic root of 21698094 is about 278.9162786271.

The spelling of 21698094 in words is "twenty-one million, six hundred ninety-eight thousand, ninety-four".