21401031032 has 8 divisors (see below), whose sum is σ = 40126933200. Its totient is φ = 10700515512.

The previous prime is 21401031031. The next prime is 21401031049. The reversal of 21401031032 is 23013010412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21401031032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401031031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1337564432 + ... + 1337564447.

It is an arithmetic number, because the mean of its divisors is an integer number (5015866650).

Almost surely, 2^21401031032 is an apocalyptic number.

It is an amenable number.

21401031032 is a deficient number, since it is larger than the sum of its proper divisors (18725902168).

21401031032 is a wasteful number, since it uses less digits than its factorization.

21401031032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675128885 (or 2675128881 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21401031032 its reverse (23013010412), we get a palindrome (44414041444).

The spelling of 21401031032 in words is "twenty-one billion, four hundred one million, thirty-one thousand, thirty-two".