21404401230 has 32 divisors (see below), whose sum is σ = 51400093824. Its totient is φ = 5704559136.

The previous prime is 21404401219. The next prime is 21404401241. The reversal of 21404401230 is 3210440412.

It is an interprime number because it is at equal distance from previous prime (21404401219) and next prime (21404401241).

It is a junction number, because it is equal to n+sod(n) for n = 21404401197 and 21404401206.

It is a congruent number.

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, 151792 + ... + 256611.

It is an arithmetic number, because the mean of its divisors is an integer number (1606252932).

Almost surely, 2^21404401230 is an apocalyptic number.

21404401230 is an abundant number, since it is smaller than the sum of its proper divisors (29995692594).

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

21404401230 is a wasteful number, since it uses less digits than its factorization.

21404401230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410160.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21404401230 its reverse (3210440412), we get a palindrome (24614841642).

The spelling of 21404401230 in words is "twenty-one billion, four hundred four million, four hundred one thousand, two hundred thirty".