21203031332 has 48 divisors (see below), whose sum is σ = 43056690432. Its totient is φ = 8947998720.

The previous prime is 21203031299. The next prime is 21203031341. The reversal of 21203031332 is 23313030212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302113 + ... + 1318295.

It is an arithmetic number, because the mean of its divisors is an integer number (897014384).

Almost surely, 2^21203031332 is an apocalyptic number.

It is an amenable number.

21203031332 is an abundant number, since it is smaller than the sum of its proper divisors (21853659100).

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

21203031332 is a wasteful number, since it uses less digits than its factorization.

21203031332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16908 (or 16906 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21203031332 its reverse (23313030212), we get a palindrome (44516061544).

The spelling of 21203031332 in words is "twenty-one billion, two hundred three million, thirty-one thousand, three hundred thirty-two".