20021011023 has 16 divisors (see below), whose sum is σ = 28750740480. Its totient is φ = 12319498464.

The previous prime is 20021011019. The next prime is 20021011033. The reversal of 20021011023 is 32011012002.

It is not a de Polignac number, because 20021011023 - 2² = 20021011019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021011033) 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, 668590 + ... + 697892.

It is an arithmetic number, because the mean of its divisors is an integer number (1796921280).

Almost surely, 2^20021011023 is an apocalyptic number.

20021011023 is a deficient number, since it is larger than the sum of its proper divisors (8729729457).

20021011023 is a wasteful number, since it uses less digits than its factorization.

20021011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46838.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20021011023 its reverse (32011012002), we get a palindrome (52032023025).

The spelling of 20021011023 in words is "twenty billion, twenty-one million, eleven thousand, twenty-three".