21413433 has 8 divisors (see below), whose sum is σ = 28583296. Its totient is φ = 14259600.

The previous prime is 21413423. The next prime is 21413443. The reversal of 21413433 is 33431412.

It is an interprime number because it is at equal distance from previous prime (21413423) and next prime (21413443).

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

It is not a de Polignac number, because 21413433 - 2⁶ = 21413369 is a prime.

It is a super-2 number, since 2×21413433² = 917070225690978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21413423) 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, 433 + ... + 6558.

It is an arithmetic number, because the mean of its divisors is an integer number (3572912).

Almost surely, 2^21413433 is an apocalyptic number.

It is an amenable number.

21413433 is a deficient number, since it is larger than the sum of its proper divisors (7169863).

21413433 is a wasteful number, since it uses less digits than its factorization.

21413433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015.

The product of its digits is 864, while the sum is 21.

The square root of 21413433 is about 4627.4650728017. The cubic root of 21413433 is about 277.6911887564.

Adding to 21413433 its reverse (33431412), we get a palindrome (54844845).

The spelling of 21413433 in words is "twenty-one million, four hundred thirteen thousand, four hundred thirty-three".