21419028423 has 64 divisors (see below), whose sum is σ = 36104140800. Its totient is φ = 12455372160.

The previous prime is 21419028373. The next prime is 21419028437. The reversal of 21419028423 is 32482091412.

21419028423 is a `hidden beast` number, since 2 + 141 + 90 + 2 + 8 + 423 = 666.

It is not a de Polignac number, because 21419028423 - 2⁶ = 21419028359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21419028923) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 456028 + ... + 500798.

It is an arithmetic number, because the mean of its divisors is an integer number (564127200).

Almost surely, 2^21419028423 is an apocalyptic number.

21419028423 is a deficient number, since it is larger than the sum of its proper divisors (14685112377).

21419028423 is a wasteful number, since it uses less digits than its factorization.

21419028423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44869 (or 44863 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 21419028423 in words is "twenty-one billion, four hundred nineteen million, twenty-eight thousand, four hundred twenty-three".