21023203032 has 48 divisors (see below), whose sum is σ = 61317678240. Its totient is φ = 6468677568.

The previous prime is 21023203007. The next prime is 21023203039. The reversal of 21023203032 is 23030232012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21023202996 and 21023203014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023203039) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11229408 + ... + 11231279.

It is an arithmetic number, because the mean of its divisors is an integer number (1277451630).

Almost surely, 2^21023203032 is an apocalyptic number.

It is an amenable number.

21023203032 is an abundant number, since it is smaller than the sum of its proper divisors (40294475208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023203032 is a wasteful number, since it uses less digits than its factorization.

21023203032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460712 (or 22460705 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21023203032 its reverse (23030232012), we get a palindrome (44053435044).

The spelling of 21023203032 in words is "twenty-one billion, twenty-three million, two hundred three thousand, thirty-two".