23235021 has 6 divisors (see below), whose sum is σ = 33561710. Its totient is φ = 15490008.

The previous prime is 23235019. The next prime is 23235053. The reversal of 23235021 is 12053232.

It can be written as a sum of positive squares in only one way, i.e., 21288996 + 1946025 = 4614^2 + 1395^2 .

It is not a de Polignac number, because 23235021 - 2¹ = 23235019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23234985 and 23235003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23235011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1290826 + ... + 1290843.

Almost surely, 2^23235021 is an apocalyptic number.

It is an amenable number.

23235021 is a deficient number, since it is larger than the sum of its proper divisors (10326689).

23235021 is a wasteful number, since it uses less digits than its factorization.

23235021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581675 (or 2581672 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 23235021 is about 4820.2718802989. The cubic root of 23235021 is about 285.3520672124.

Adding to 23235021 its reverse (12053232), we get a palindrome (35288253).

It can be divided in two parts, 232 and 35021, that added together give a palindrome (35253).

The spelling of 23235021 in words is "twenty-three million, two hundred thirty-five thousand, twenty-one".