21401200232 has 16 divisors (see below), whose sum is σ = 40133477760. Its totient is φ = 10698939504.

The previous prime is 21401200217. The next prime is 21401200273. The reversal of 21401200232 is 23200210412.

It is a super-2 number, since 2×21401200232² (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 21401200232.

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 3 ways as a sum of consecutive naturals, for example, 151928 + ... + 256679.

It is an arithmetic number, because the mean of its divisors is an integer number (2508342360).

Almost surely, 2^21401200232 is an apocalyptic number.

It is an amenable number.

21401200232 is a deficient number, since it is larger than the sum of its proper divisors (18732277528).

21401200232 is a wasteful number, since it uses less digits than its factorization.

21401200232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415160 (or 415156 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21401200232 its reverse (23200210412), we get a palindrome (44601410644).

The spelling of 21401200232 in words is "twenty-one billion, four hundred one million, two hundred thousand, two hundred thirty-two".