20633001421 has 8 divisors (see below), whose sum is σ = 21300263424. Its totient is φ = 19965844560.

The previous prime is 20633001409. The next prime is 20633001463. The reversal of 20633001421 is 12410033602.

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 20633001421 - 2⁹ = 20633000909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20633001392 and 20633001401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20633001491) 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, 645216 + ... + 676438.

It is an arithmetic number, because the mean of its divisors is an integer number (2662532928).

Almost surely, 2^20633001421 is an apocalyptic number.

It is an amenable number.

20633001421 is a deficient number, since it is larger than the sum of its proper divisors (667262003).

20633001421 is a wasteful number, since it uses less digits than its factorization.

20633001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52571.

The product of its (nonzero) digits is 864, while the sum is 22.

The spelling of 20633001421 in words is "twenty billion, six hundred thirty-three million, one thousand, four hundred twenty-one".