21477317530502 has 4 divisors (see below), whose sum is σ = 32215976295756. Its totient is φ = 10738658765250.

The previous prime is 21477317530483. The next prime is 21477317530507. The reversal of 21477317530502 is 20503571377412.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21477317530502² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477317530507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5369329382624 + ... + 5369329382627.

It is an arithmetic number, because the mean of its divisors is an integer number (8053994073939).

Almost surely, 2^{21477317530502} is an apocalyptic number.

21477317530502 is a deficient number, since it is larger than the sum of its proper divisors (10738658765254).

21477317530502 is a wasteful number, since it uses less digits than its factorization.

21477317530502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10738658765253.

The product of its (nonzero) digits is 1234800, while the sum is 47.

The spelling of 21477317530502 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred seventeen million, five hundred thirty thousand, five hundred two".