21633350467642 has 8 divisors (see below), whose sum is σ = 32520416214132. Its totient is φ = 10793211729600.

The previous prime is 21633350467609. The next prime is 21633350467649. The reversal of 21633350467642 is 24676405333612.

It can be written as a sum of positive squares in 2 ways, for example, as 21392003272201 + 241347195441 = 4625149^2 + 491271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21633350467642.

It is not an unprimeable number, because it can be changed into a prime (21633350467649) 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, 11731750959 + ... + 11731752802.

Almost surely, 2^{21633350467642} is an apocalyptic number.

21633350467642 is a deficient number, since it is larger than the sum of its proper divisors (10887065746490).

21633350467642 is a wasteful number, since it uses less digits than its factorization.

21633350467642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23463504224.

The product of its (nonzero) digits is 13063680, while the sum is 52.

The spelling of 21633350467642 in words is "twenty-one trillion, six hundred thirty-three billion, three hundred fifty million, four hundred sixty-seven thousand, six hundred forty-two".