63623021 has 24 divisors (see below), whose sum is σ = 82736640. Its totient is φ = 48350400.

The previous prime is 63623011. The next prime is 63623023. The reversal of 63623021 is 12032636.

It is not a de Polignac number, because 63623021 - 2²² = 59428717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63623023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20660 + ... + 23538.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^63623021 is an apocalyptic number.

It is an amenable number.

63623021 is a deficient number, since it is larger than the sum of its proper divisors (19113619).

63623021 is a wasteful number, since it uses less digits than its factorization.

63623021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945 (or 2938 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 63623021 is about 7976.4040143413. The cubic root of 63623021 is about 399.2130799908.

Adding to 63623021 its reverse (12032636), we get a palindrome (75655657).

The spelling of 63623021 in words is "sixty-three million, six hundred twenty-three thousand, twenty-one".