21155876463 has 8 divisors (see below), whose sum is σ = 28349584000. Its totient is φ = 14033043288.

The previous prime is 21155876411. The next prime is 21155876479. The reversal of 21155876463 is 36467855112.

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

It is not a de Polignac number, because 21155876463 - 2¹⁰ = 21155875439 is a prime.

It is a super-2 number, since 2×21155876463² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155876263) 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, 17717893 + ... + 17719086.

It is an arithmetic number, because the mean of its divisors is an integer number (3543698000).

Almost surely, 2^21155876463 is an apocalyptic number.

21155876463 is a deficient number, since it is larger than the sum of its proper divisors (7193707537).

21155876463 is a wasteful number, since it uses less digits than its factorization.

21155876463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35437181.

The product of its digits is 1209600, while the sum is 48.

The spelling of 21155876463 in words is "twenty-one billion, one hundred fifty-five million, eight hundred seventy-six thousand, four hundred sixty-three".