21235038 has 16 divisors (see below), whose sum is σ = 46331136. Its totient is φ = 6434840.

The previous prime is 21235037. The next prime is 21235051. The reversal of 21235038 is 83053212.

It is a super-2 number, since 2×21235038² = 901853677722888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21234999 and 21235017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21235037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160806 + ... + 160937.

It is an arithmetic number, because the mean of its divisors is an integer number (2895696).

Almost surely, 2^21235038 is an apocalyptic number.

21235038 is an abundant number, since it is smaller than the sum of its proper divisors (25096098).

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

21235038 is a wasteful number, since it uses less digits than its factorization.

21235038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321759.

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

The square root of 21235038 is about 4608.1490861299. The cubic root of 21235038 is about 276.9178902281.

The spelling of 21235038 in words is "twenty-one million, two hundred thirty-five thousand, thirty-eight".