21825038 has 8 divisors (see below), whose sum is σ = 33536160. Its totient is φ = 10646320.

The previous prime is 21825031. The next prime is 21825043. The reversal of 21825038 is 83052812.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21825038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21825031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132998 + ... + 133161.

It is an arithmetic number, because the mean of its divisors is an integer number (4192020).

Almost surely, 2^21825038 is an apocalyptic number.

21825038 is a deficient number, since it is larger than the sum of its proper divisors (11711122).

21825038 is a wasteful number, since it uses less digits than its factorization.

21825038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266202.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 21825038 is about 4671.7275177390. The cubic root of 21825038 is about 279.4591515471.

The spelling of 21825038 in words is "twenty-one million, eight hundred twenty-five thousand, thirty-eight".