63372021 has 4 divisors (see below), whose sum is σ = 84496032. Its totient is φ = 42248012.

The previous prime is 63372007. The next prime is 63372031. The reversal of 63372021 is 12027336.

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 63372021 - 2¹⁰ = 63370997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63371982 and 63372000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63372031) 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, 10562001 + ... + 10562006.

It is an arithmetic number, because the mean of its divisors is an integer number (21124008).

Almost surely, 2^63372021 is an apocalyptic number.

It is an amenable number.

63372021 is a deficient number, since it is larger than the sum of its proper divisors (21124011).

63372021 is a wasteful number, since it uses less digits than its factorization.

63372021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21124010.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 63372021 is about 7960.6545585146. The cubic root of 63372021 is about 398.6874078829.

Adding to 63372021 its reverse (12027336), we get a palindrome (75399357).

The spelling of 63372021 in words is "sixty-three million, three hundred seventy-two thousand, twenty-one".