21376054 has 24 divisors (see below), whose sum is σ = 37941480. Its totient is φ = 9003456.

The previous prime is 21376051. The next prime is 21376067. The reversal of 21376054 is 45067312.

It is a super-2 number, since 2×21376054² = 913871369221832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21376051) 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 11 ways as a sum of consecutive naturals, for example, 3934 + ... + 7630.

It is an arithmetic number, because the mean of its divisors is an integer number (1580895).

Almost surely, 2^21376054 is an apocalyptic number.

21376054 is a deficient number, since it is larger than the sum of its proper divisors (16565426).

21376054 is a wasteful number, since it uses less digits than its factorization.

21376054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772 (or 3765 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 21376054 is about 4623.4244884068. The cubic root of 21376054 is about 277.5295166504.

It can be divided in two parts, 213 and 76054, that added together give a palindrome (76267).

The spelling of 21376054 in words is "twenty-one million, three hundred seventy-six thousand, fifty-four".