63321940 has 48 divisors (see below), whose sum is σ = 153607104. Its totient is φ = 21670400.

The previous prime is 63321919. The next prime is 63321941. The reversal of 63321940 is 4912336.

It is a junction number, because it is equal to n+sod(n) for n = 63321899 and 63321908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63321941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4726 + ... + 12205.

It is an arithmetic number, because the mean of its divisors is an integer number (3200148).

Almost surely, 2^63321940 is an apocalyptic number.

It is an amenable number.

63321940 is an abundant number, since it is smaller than the sum of its proper divisors (90285164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63321940 is a wasteful number, since it uses less digits than its factorization.

63321940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16968 (or 16966 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 63321940 is about 7957.5084040169. The cubic root of 63321940 is about 398.5823566539.

It can be divided in two parts, 63321 and 940, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 63321940 in words is "sixty-three million, three hundred twenty-one thousand, nine hundred forty".