634416021 has 24 divisors (see below), whose sum is σ = 924031680. Its totient is φ = 419428800.

The previous prime is 634416019. The next prime is 634416031. The reversal of 634416021 is 120614436.

634416021 is a `hidden beast` number, since 634 + 4 + 1 + 6 + 0 + 21 = 666.

634416021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 634416021 - 2¹ = 634416019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634416031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 833281 + ... + 834041.

It is an arithmetic number, because the mean of its divisors is an integer number (38501320).

Almost surely, 2^634416021 is an apocalyptic number.

It is an amenable number.

634416021 is a deficient number, since it is larger than the sum of its proper divisors (289615659).

634416021 is a wasteful number, since it uses less digits than its factorization.

634416021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1414 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 634416021 is about 25187.6164215672. The cubic root of 634416021 is about 859.2602350343.

The spelling of 634416021 in words is "six hundred thirty-four million, four hundred sixteen thousand, twenty-one".