21269351675 has 48 divisors (see below), whose sum is σ = 31740780960. Its totient is φ = 13930368000.

The previous prime is 21269351671. The next prime is 21269351681. The reversal of 21269351675 is 57615396212.

It is not a de Polignac number, because 21269351675 - 2² = 21269351671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21269351671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74021 + ... + 219129.

It is an arithmetic number, because the mean of its divisors is an integer number (661266270).

Almost surely, 2^21269351675 is an apocalyptic number.

21269351675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21269351675 is a deficient number, since it is larger than the sum of its proper divisors (10471429285).

21269351675 is a wasteful number, since it uses less digits than its factorization.

21269351675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145184 (or 145179 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The spelling of 21269351675 in words is "twenty-one billion, two hundred sixty-nine million, three hundred fifty-one thousand, six hundred seventy-five".