21318429027 has 32 divisors (see below), whose sum is σ = 32958374400. Its totient is φ = 12005814528.

The previous prime is 21318428983. The next prime is 21318429031. The reversal of 21318429027 is 72092481312.

It is not a de Polignac number, because 21318429027 - 2¹² = 21318424931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21318429227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373249 + ... + 426557.

It is an arithmetic number, because the mean of its divisors is an integer number (1029949200).

Almost surely, 2^21318429027 is an apocalyptic number.

21318429027 is a deficient number, since it is larger than the sum of its proper divisors (11639945373).

21318429027 is a wasteful number, since it uses less digits than its factorization.

21318429027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53595.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 21318429027 in words is "twenty-one billion, three hundred eighteen million, four hundred twenty-nine thousand, twenty-seven".