21479414 has 16 divisors (see below), whose sum is σ = 35493120. Its totient is φ = 9667560.

The previous prime is 21479407. The next prime is 21479429. The reversal of 21479414 is 41497412.

It is a super-2 number, since 2×21479414² = 922730451566792, which contains 22 as substring.

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, 2474 + ... + 7005.

It is an arithmetic number, because the mean of its divisors is an integer number (2218320).

Almost surely, 2^21479414 is an apocalyptic number.

21479414 is a deficient number, since it is larger than the sum of its proper divisors (14013706).

21479414 is a wasteful number, since it uses less digits than its factorization.

21479414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595.

The product of its digits is 8064, while the sum is 32.

The square root of 21479414 is about 4634.5888706551. The cubic root of 21479414 is about 277.9761120202.

The spelling of 21479414 in words is "twenty-one million, four hundred seventy-nine thousand, four hundred fourteen".