21325038 has 32 divisors (see below), whose sum is σ = 51611904. Its totient is φ = 5734272.

The previous prime is 21325037. The next prime is 21325093. The reversal of 21325038 is 83052312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21324999 and 21325017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325037) 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 15 ways as a sum of consecutive naturals, for example, 14220 + ... + 15647.

It is an arithmetic number, because the mean of its divisors is an integer number (1612872).

Almost surely, 2^21325038 is an apocalyptic number.

21325038 is an abundant number, since it is smaller than the sum of its proper divisors (30286866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21325038 is a wasteful number, since it uses less digits than its factorization.

21325038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29896.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 21325038 is about 4617.9040700300. The cubic root of 21325038 is about 277.3085571868.

The spelling of 21325038 in words is "twenty-one million, three hundred twenty-five thousand, thirty-eight".