20232021155 has 32 divisors (see below), whose sum is σ = 24994246464. Its totient is φ = 15716929536.

The previous prime is 20232021149. The next prime is 20232021193. The reversal of 20232021155 is 55112023202.

It is not a de Polignac number, because 20232021155 - 2²⁰ = 20230972579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20232021155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7456079 + ... + 7458791.

It is an arithmetic number, because the mean of its divisors is an integer number (781070202).

Almost surely, 2^20232021155 is an apocalyptic number.

20232021155 is a deficient number, since it is larger than the sum of its proper divisors (4762225309).

20232021155 is a wasteful number, since it uses less digits than its factorization.

20232021155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20232021155 its reverse (55112023202), we get a palindrome (75344044357).

The spelling of 20232021155 in words is "twenty billion, two hundred thirty-two million, twenty-one thousand, one hundred fifty-five".