21035376 has 50 divisors (see below), whose sum is σ = 60886232. Its totient is φ = 7011360.

The previous prime is 21035359. The next prime is 21035389. The reversal of 21035376 is 67353012.

It is a happy number.

It is a super-2 number, since 2×21035376² = 884974086922752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6820 + ... + 9411.

Almost surely, 2^21035376 is an apocalyptic number.

It is an amenable number.

21035376 is an abundant number, since it is smaller than the sum of its proper divisors (39850856).

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

21035376 is a wasteful number, since it uses less digits than its factorization.

21035376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16251 (or 16236 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 21035376 is about 4586.4339088228. The cubic root of 21035376 is about 276.0472508894.

Adding to 21035376 its reverse (67353012), we get a palindrome (88388388).

The spelling of 21035376 in words is "twenty-one million, thirty-five thousand, three hundred seventy-six".