20033100021 has 16 divisors (see below), whose sum is σ = 29816709120. Its totient is φ = 11858916720.

The previous prime is 20033100019. The next prime is 20033100041. The reversal of 20033100021 is 12000133002.

It is a happy number.

It is not a de Polignac number, because 20033100021 - 2¹ = 20033100019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033100041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7057461 + ... + 7060298.

It is an arithmetic number, because the mean of its divisors is an integer number (1863544320).

Almost surely, 2^20033100021 is an apocalyptic number.

It is an amenable number.

20033100021 is a deficient number, since it is larger than the sum of its proper divisors (9783609099).

20033100021 is a wasteful number, since it uses less digits than its factorization.

20033100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14117816.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20033100021 its reverse (12000133002), we get a palindrome (32033233023).

The spelling of 20033100021 in words is "twenty billion, thirty-three million, one hundred thousand, twenty-one".