21431410002 has 64 divisors (see below), whose sum is σ = 49386153600. Its totient is φ = 6880870080.

The previous prime is 21431409977. The next prime is 21431410019. The reversal of 21431410002 is 20001413412.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 643033 + ... + 675539.

It is an arithmetic number, because the mean of its divisors is an integer number (771658650).

Almost surely, 2^21431410002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21431410002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24693076800).

21431410002 is an abundant number, since it is smaller than the sum of its proper divisors (27954743598).

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

21431410002 is a wasteful number, since it uses less digits than its factorization.

21431410002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32968 (or 32962 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21431410002 its reverse (20001413412), we get a palindrome (41432823414).

The spelling of 21431410002 in words is "twenty-one billion, four hundred thirty-one million, four hundred ten thousand, two".