21033252023 has 16 divisors (see below), whose sum is σ = 25883400960. Its totient is φ = 16680402816.

The previous prime is 21033252007. The next prime is 21033252029. The reversal of 21033252023 is 32025233012.

It is not a de Polignac number, because 21033252023 - 2⁴ = 21033252007 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 21033252023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033252029) 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, 1490861 + ... + 1504902.

It is an arithmetic number, because the mean of its divisors is an integer number (1617712560).

Almost surely, 2^21033252023 is an apocalyptic number.

21033252023 is a deficient number, since it is larger than the sum of its proper divisors (4850148937).

21033252023 is a wasteful number, since it uses less digits than its factorization.

21033252023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995846.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 21033252023 its reverse (32025233012), we get a palindrome (53058485035).

The spelling of 21033252023 in words is "twenty-one billion, thirty-three million, two hundred fifty-two thousand, twenty-three".