21342000402 has 48 divisors (see below), whose sum is σ = 46530132480. Its totient is φ = 7069596000.

The previous prime is 21342000391. The next prime is 21342000419. The reversal of 21342000402 is 20400024312.

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 23 ways as a sum of consecutive naturals, for example, 4222777 + ... + 4227827.

It is an arithmetic number, because the mean of its divisors is an integer number (969377760).

Almost surely, 2^21342000402 is an apocalyptic number.

21342000402 is an abundant number, since it is smaller than the sum of its proper divisors (25188132078).

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

21342000402 is a wasteful number, since it uses less digits than its factorization.

21342000402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6479 (or 6476 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21342000402 its reverse (20400024312), we get a palindrome (41742024714).

The spelling of 21342000402 in words is "twenty-one billion, three hundred forty-two million, four hundred two", and thus it is an aban number.