21004314354 has 72 divisors (see below), whose sum is σ = 46763738112. Its totient is φ = 6813162720.

The previous prime is 21004314347. The next prime is 21004314467. The reversal of 21004314354 is 45341340012.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6419739 + ... + 6423009.

Almost surely, 2^21004314354 is an apocalyptic number.

21004314354 is an abundant number, since it is smaller than the sum of its proper divisors (25759423758).

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

21004314354 is a wasteful number, since it uses less digits than its factorization.

21004314354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21004314354 its reverse (45341340012), we get a palindrome (66345654366).

The spelling of 21004314354 in words is "twenty-one billion, four million, three hundred fourteen thousand, three hundred fifty-four".