20001023331 has 16 divisors (see below), whose sum is σ = 27568217088. Its totient is φ = 12885170400.

The previous prime is 20001023309. The next prime is 20001023381. The reversal of 20001023331 is 13332010002.

It is not a de Polignac number, because 20001023331 - 2⁵ = 20001023299 is a prime.

It is a super-2 number, since 2×20001023331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001023331.

It is not an unprimeable number, because it can be changed into a prime (20001023381) 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, 91356 + ... + 219881.

It is an arithmetic number, because the mean of its divisors is an integer number (1723013568).

Almost surely, 2^20001023331 is an apocalyptic number.

20001023331 is a deficient number, since it is larger than the sum of its proper divisors (7567193757).

20001023331 is a wasteful number, since it uses less digits than its factorization.

20001023331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311962.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20001023331 its reverse (13332010002), we get a palindrome (33333033333).

The spelling of 20001023331 in words is "twenty billion, one million, twenty-three thousand, three hundred thirty-one".