21473451902 has 8 divisors (see below), whose sum is σ = 36811631856. Its totient is φ = 9202907952.

The previous prime is 21473451877. The next prime is 21473451917. The reversal of 21473451902 is 20915437412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21473451902² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766908983 + ... + 766909010.

It is an arithmetic number, because the mean of its divisors is an integer number (4601453982).

Almost surely, 2^21473451902 is an apocalyptic number.

21473451902 is a deficient number, since it is larger than the sum of its proper divisors (15338179954).

21473451902 is a wasteful number, since it uses less digits than its factorization.

21473451902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533818002.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 21473451902 in words is "twenty-one billion, four hundred seventy-three million, four hundred fifty-one thousand, nine hundred two".