21376754 has 16 divisors (see below), whose sum is σ = 36706176. Its totient is φ = 9146400.

The previous prime is 21376739. The next prime is 21376757. The reversal of 21376754 is 45767312.

It is a super-2 number, since 2×21376754² = 913931223153032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21376757) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13694 + ... + 15174.

It is an arithmetic number, because the mean of its divisors is an integer number (2294136).

Almost surely, 2^21376754 is an apocalyptic number.

21376754 is a deficient number, since it is larger than the sum of its proper divisors (15329422).

21376754 is a wasteful number, since it uses less digits than its factorization.

21376754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521.

The product of its digits is 35280, while the sum is 35.

The square root of 21376754 is about 4623.5001892506. The cubic root of 21376754 is about 277.5325460299.

It can be divided in two parts, 213 and 76754, that added together give a palindrome (76967).

The spelling of 21376754 in words is "twenty-one million, three hundred seventy-six thousand, seven hundred fifty-four".