21425349069 has 64 divisors (see below), whose sum is σ = 33895008000. Its totient is φ = 13337395200.

The previous prime is 21425349037. The next prime is 21425349097. The reversal of 21425349069 is 96094352412.

21425349069 is a `hidden beast` number, since 21 + 4 + 2 + 534 + 90 + 6 + 9 = 666.

It is not a de Polignac number, because 21425349069 - 2⁵ = 21425349037 is a prime.

It is a super-2 number, since 2×21425349069² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21425329069) 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 63 ways as a sum of consecutive naturals, for example, 13315137 + ... + 13316745.

It is an arithmetic number, because the mean of its divisors is an integer number (529609500).

Almost surely, 2^21425349069 is an apocalyptic number.

It is an amenable number.

21425349069 is a deficient number, since it is larger than the sum of its proper divisors (12469658931).

21425349069 is a wasteful number, since it uses less digits than its factorization.

21425349069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 21425349069 in words is "twenty-one billion, four hundred twenty-five million, three hundred forty-nine thousand, sixty-nine".