21374076 has 12 divisors (see below), whose sum is σ = 49872872. Its totient is φ = 7124688.

The previous prime is 21374071. The next prime is 21374113. The reversal of 21374076 is 67047312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21374076² = 913702249707552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 890575 + ... + 890598.

Almost surely, 2^21374076 is an apocalyptic number.

It is an amenable number.

21374076 is an abundant number, since it is smaller than the sum of its proper divisors (28498796).

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

21374076 is a wasteful number, since it uses less digits than its factorization.

21374076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781180 (or 1781178 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 21374076 is about 4623.2105727514. The cubic root of 21374076 is about 277.5209561319.

The spelling of 21374076 in words is "twenty-one million, three hundred seventy-four thousand, seventy-six".