21230466878 has 8 divisors (see below), whose sum is σ = 31852779672. Its totient is φ = 10612873656.

The previous prime is 21230466863. The next prime is 21230466893. The reversal of 21230466878 is 87866403212.

It is an interprime number because it is at equal distance from previous prime (21230466863) and next prime (21230466893).

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

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, 1168625 + ... + 1186652.

It is an arithmetic number, because the mean of its divisors is an integer number (3981597459).

Almost surely, 2^21230466878 is an apocalyptic number.

21230466878 is a deficient number, since it is larger than the sum of its proper divisors (10622312794).

21230466878 is a wasteful number, since it uses less digits than its factorization.

21230466878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359786.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 21230466878 in words is "twenty-one billion, two hundred thirty million, four hundred sixty-six thousand, eight hundred seventy-eight".