21270504671 has 8 divisors (see below), whose sum is σ = 22910594784. Its totient is φ = 19630971360.

The previous prime is 21270504653. The next prime is 21270504679. The reversal of 21270504671 is 17640507212.

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

It is not a de Polignac number, because 21270504671 - 2³⁰ = 20196762847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21270504679) 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, 58100 + ... + 214281.

It is an arithmetic number, because the mean of its divisors is an integer number (2863824348).

Almost surely, 2^21270504671 is an apocalyptic number.

21270504671 is a deficient number, since it is larger than the sum of its proper divisors (1640090113).

21270504671 is a wasteful number, since it uses less digits than its factorization.

21270504671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278401.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 21270504671 in words is "twenty-one billion, two hundred seventy million, five hundred four thousand, six hundred seventy-one".