21270609423 has 32 divisors (see below), whose sum is σ = 38132190720. Its totient is φ = 11439653760.

The previous prime is 21270609419. The next prime is 21270609433. The reversal of 21270609423 is 32490607212.

21270609423 is a `hidden beast` number, since 2 + 1 + 2 + 7 + 0 + 609 + 42 + 3 = 666.

It is not a de Polignac number, because 21270609423 - 2² = 21270609419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21270609433) 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, 3306873 + ... + 3313298.

It is an arithmetic number, because the mean of its divisors is an integer number (1191630960).

Almost surely, 2^21270609423 is an apocalyptic number.

21270609423 is a deficient number, since it is larger than the sum of its proper divisors (16861581297).

21270609423 is a wasteful number, since it uses less digits than its factorization.

21270609423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620204 (or 6620198 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 21270609423 in words is "twenty-one billion, two hundred seventy million, six hundred nine thousand, four hundred twenty-three".