20401000633 has 8 divisors (see below), whose sum is σ = 22036688576. Its totient is φ = 18774795600.

The previous prime is 20401000597. The next prime is 20401000639. The reversal of 20401000633 is 33600010402.

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

It is a cyclic number.

It is not a de Polignac number, because 20401000633 - 2⁹ = 20401000121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20401000633.

It is not an unprimeable number, because it can be changed into a prime (20401000639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2366253 + ... + 2374858.

It is an arithmetic number, because the mean of its divisors is an integer number (2754586072).

Almost surely, 2^20401000633 is an apocalyptic number.

It is an amenable number.

20401000633 is a deficient number, since it is larger than the sum of its proper divisors (1635687943).

20401000633 is a wasteful number, since it uses less digits than its factorization.

20401000633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4741455.

The product of its (nonzero) digits is 432, while the sum is 19.

The spelling of 20401000633 in words is "twenty billion, four hundred one million, six hundred thirty-three", and thus it is an aban number.