21032693 has 4 divisors (see below), whose sum is σ = 22944768. Its totient is φ = 19120620.

The previous prime is 21032659. The next prime is 21032699. The reversal of 21032693 is 39623012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21032693 - 2⁶ = 21032629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032699) 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, 956021 + ... + 956042.

It is an arithmetic number, because the mean of its divisors is an integer number (5736192).

Almost surely, 2^21032693 is an apocalyptic number.

It is an amenable number.

21032693 is a deficient number, since it is larger than the sum of its proper divisors (1912075).

21032693 is a wasteful number, since it uses less digits than its factorization.

21032693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912074.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 21032693 is about 4586.1414064549. The cubic root of 21032693 is about 276.0355140536.

The spelling of 21032693 in words is "twenty-one million, thirty-two thousand, six hundred ninety-three".