21474735 has 8 divisors (see below), whose sum is σ = 34359600. Its totient is φ = 11453184.

The previous prime is 21474707. The next prime is 21474737. The reversal of 21474735 is 53747412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21474735 - 2⁹ = 21474223 is a prime.

It is a super-2 number, since 2×21474735² = 922328486640450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21474696 and 21474705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21474737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715810 + ... + 715839.

It is an arithmetic number, because the mean of its divisors is an integer number (4294950).

Almost surely, 2^21474735 is an apocalyptic number.

21474735 is a deficient number, since it is larger than the sum of its proper divisors (12884865).

21474735 is a wasteful number, since it uses less digits than its factorization.

21474735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431657.

The product of its digits is 23520, while the sum is 33.

The square root of 21474735 is about 4634.0840518920. The cubic root of 21474735 is about 277.9559261082.

The spelling of 21474735 in words is "twenty-one million, four hundred seventy-four thousand, seven hundred thirty-five".