21004142334 has 24 divisors (see below), whose sum is σ = 48866780808. Its totient is φ = 6001183440.

The previous prime is 21004142333. The next prime is 21004142353. The reversal of 21004142334 is 43324140012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004142333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35721037 + ... + 35721624.

It is an arithmetic number, because the mean of its divisors is an integer number (2036115867).

Almost surely, 2^21004142334 is an apocalyptic number.

21004142334 is an abundant number, since it is smaller than the sum of its proper divisors (27862638474).

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

21004142334 is a wasteful number, since it uses less digits than its factorization.

21004142334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71442680 (or 71442673 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21004142334 its reverse (43324140012), we get a palindrome (64328282346).

The spelling of 21004142334 in words is "twenty-one billion, four million, one hundred forty-two thousand, three hundred thirty-four".