21347363773 has 8 divisors (see below), whose sum is σ = 22288346496. Its totient is φ = 20407450800.

The previous prime is 21347363731. The next prime is 21347363783. The reversal of 21347363773 is 37736374312.

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

It is a cyclic number.

It is not a de Polignac number, because 21347363773 - 2¹³ = 21347355581 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 (21347363783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226513 + ... + 306598.

It is an arithmetic number, because the mean of its divisors is an integer number (2786043312).

Almost surely, 2^21347363773 is an apocalyptic number.

21347363773 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21347363773 is a deficient number, since it is larger than the sum of its proper divisors (940982723).

21347363773 is a wasteful number, since it uses less digits than its factorization.

21347363773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534875.

The product of its digits is 1333584, while the sum is 46.

The spelling of 21347363773 in words is "twenty-one billion, three hundred forty-seven million, three hundred sixty-three thousand, seven hundred seventy-three".