21529054 has 8 divisors (see below), whose sum is σ = 32404680. Its totient is φ = 10727496.

The previous prime is 21529051. The next prime is 21529061. The reversal of 21529054 is 45092512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21529054² = 927000332269832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21529051) 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, 17784 + ... + 18955.

It is an arithmetic number, because the mean of its divisors is an integer number (4050585).

Almost surely, 2^21529054 is an apocalyptic number.

21529054 is a deficient number, since it is larger than the sum of its proper divisors (10875626).

21529054 is a wasteful number, since it uses less digits than its factorization.

21529054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37034.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 21529054 is about 4639.9411634201. The cubic root of 21529054 is about 278.1900861688.

The spelling of 21529054 in words is "twenty-one million, five hundred twenty-nine thousand, fifty-four".