21736802 has 8 divisors (see below), whose sum is σ = 32625516. Its totient is φ = 10861632.

The previous prime is 21736769. The next prime is 21736823. The reversal of 21736802 is 20863712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 11881 = 4661^2 + 109^2 .

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

It is a super-2 number, since 2×21736802² = 944977122374408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3158 + ... + 7310.

Almost surely, 2^21736802 is an apocalyptic number.

21736802 is a deficient number, since it is larger than the sum of its proper divisors (10888714).

21736802 is a wasteful number, since it uses less digits than its factorization.

21736802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 21736802 is about 4662.2743377026. The cubic root of 21736802 is about 279.0820363154.

The spelling of 21736802 in words is "twenty-one million, seven hundred thirty-six thousand, eight hundred two".