21472220332 has 24 divisors (see below), whose sum is σ = 38207085840. Its totient is φ = 10556045760.

The previous prime is 21472220317. The next prime is 21472220347. The reversal of 21472220332 is 23302227412.

It is an interprime number because it is at equal distance from previous prime (21472220317) and next prime (21472220347).

It is a super-2 number, since 2×21472220332² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21472220332.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676719 + ... + 707737.

It is an arithmetic number, because the mean of its divisors is an integer number (1591961910).

Almost surely, 2^21472220332 is an apocalyptic number.

It is an amenable number.

21472220332 is a deficient number, since it is larger than the sum of its proper divisors (16734865508).

21472220332 is a wasteful number, since it uses less digits than its factorization.

21472220332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33921 (or 33919 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 21472220332 its reverse (23302227412), we get a palindrome (44774447744).

The spelling of 21472220332 in words is "twenty-one billion, four hundred seventy-two million, two hundred twenty thousand, three hundred thirty-two".