21479094 has 160 divisors (see below), whose sum is σ = 62447616. Its totient is φ = 5365440.

The previous prime is 21479093. The next prime is 21479113. The reversal of 21479094 is 49097412.

21479094 = T₃₃₂ + T₃₃₃ + ... + T₅₄₈.

It is a super-2 number, since 2×21479094² = 922702958121672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21479093) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 456979 + ... + 457025.

Almost surely, 2^21479094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21479094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31223808).

21479094 is an abundant number, since it is smaller than the sum of its proper divisors (40968522).

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

21479094 is a wasteful number, since it uses less digits than its factorization.

21479094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 21479094 is about 4634.5543475074. The cubic root of 21479094 is about 277.9747315853.

The spelling of 21479094 in words is "twenty-one million, four hundred seventy-nine thousand, ninety-four".