21401023302 has 48 divisors (see below), whose sum is σ = 48416715360. Its totient is φ = 6819031296.

The previous prime is 21401023271. The next prime is 21401023307. The reversal of 21401023302 is 20332010412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401023307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644974 + ... + 677342.

It is an arithmetic number, because the mean of its divisors is an integer number (1008681570).

Almost surely, 2^21401023302 is an apocalyptic number.

21401023302 is an abundant number, since it is smaller than the sum of its proper divisors (27015692058).

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

21401023302 is a wasteful number, since it uses less digits than its factorization.

21401023302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33997 (or 33994 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21401023302 its reverse (20332010412), we get a palindrome (41733033714).

The spelling of 21401023302 in words is "twenty-one billion, four hundred one million, twenty-three thousand, three hundred two".