21334470487 has 16 divisors (see below), whose sum is σ = 23752945440. Its totient is φ = 18997056000.

The previous prime is 21334470463. The next prime is 21334470491. The reversal of 21334470487 is 78407443312.

It is a cyclic number.

It is not a de Polignac number, because 21334470487 - 2²³ = 21326081879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334470407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319939 + ... + 380827.

It is an arithmetic number, because the mean of its divisors is an integer number (1484559090).

Almost surely, 2^21334470487 is an apocalyptic number.

21334470487 is a deficient number, since it is larger than the sum of its proper divisors (2418474953).

21334470487 is a wasteful number, since it uses less digits than its factorization.

21334470487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61554.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 21334470487 in words is "twenty-one billion, three hundred thirty-four million, four hundred seventy thousand, four hundred eighty-seven".