20021000033 has 8 divisors (see below), whose sum is σ = 20608540608. Its totient is φ = 19435903344.

The previous prime is 20020999951. The next prime is 20021000047. The reversal of 20021000033 is 33000012002.

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 20021000033 - 2¹⁸ = 20020737889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020999978 and 20021000023.

It is not an unprimeable number, because it can be changed into a prime (20021000633) 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, 594341 + ... + 627122.

It is an arithmetic number, because the mean of its divisors is an integer number (2576067576).

Almost surely, 2^20021000033 is an apocalyptic number.

It is an amenable number.

20021000033 is a deficient number, since it is larger than the sum of its proper divisors (587540575).

20021000033 is a wasteful number, since it uses less digits than its factorization.

20021000033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221943.

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 20021000033 its reverse (33000012002), we get a palindrome (53021012035).

The spelling of 20021000033 in words is "twenty billion, twenty-one million, thirty-three", and thus it is an aban number and an uban number.