21141464 has 16 divisors (see below), whose sum is σ = 41007600. Its totient is φ = 10206112.

The previous prime is 21141451. The next prime is 21141481. The reversal of 21141464 is 46414112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45332 + ... + 45795.

It is an arithmetic number, because the mean of its divisors is an integer number (2562975).

Almost surely, 2^21141464 is an apocalyptic number.

It is an amenable number.

21141464 is a deficient number, since it is larger than the sum of its proper divisors (19866136).

21141464 is a wasteful number, since it uses less digits than its factorization.

21141464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91162 (or 91158 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 21141464 is about 4597.9847759644. The cubic root of 21141464 is about 276.5105372216.

Adding to 21141464 its reverse (46414112), we get a palindrome (67555576).

It can be divided in two parts, 21141 and 464, that multiplied together give a square (9809424 = 3132²).

The spelling of 21141464 in words is "twenty-one million, one hundred forty-one thousand, four hundred sixty-four".