23428252821 has 16 divisors (see below), whose sum is σ = 32254853120. Its totient is φ = 15110541360.

The previous prime is 23428252807. The next prime is 23428252831. The reversal of 23428252821 is 12825282432.

It is not a de Polignac number, because 23428252821 - 2⁷ = 23428252693 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 23428252821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23428252831) 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, 295596 + ... + 366378.

It is an arithmetic number, because the mean of its divisors is an integer number (2015928320).

Almost surely, 2^23428252821 is an apocalyptic number.

It is an amenable number.

23428252821 is a deficient number, since it is larger than the sum of its proper divisors (8826600299).

23428252821 is a wasteful number, since it uses less digits than its factorization.

23428252821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74376.

The product of its digits is 122880, while the sum is 39.

The spelling of 23428252821 in words is "twenty-three billion, four hundred twenty-eight million, two hundred fifty-two thousand, eight hundred twenty-one".