63021945 has 32 divisors (see below), whose sum is σ = 115787520. Its totient is φ = 28673280.

The previous prime is 63021923. The next prime is 63021949. The reversal of 63021945 is 54912036.

It is not a de Polignac number, because 63021945 - 2⁵ = 63021913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63021949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22735 + ... + 25355.

It is an arithmetic number, because the mean of its divisors is an integer number (3618360).

Almost surely, 2^63021945 is an apocalyptic number.

It is an amenable number.

63021945 is a deficient number, since it is larger than the sum of its proper divisors (52765575).

63021945 is a wasteful number, since it uses less digits than its factorization.

63021945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 63021945 is about 7938.6362178903. The cubic root of 63021945 is about 397.9519167016.

The spelling of 63021945 in words is "sixty-three million, twenty-one thousand, nine hundred forty-five".