21060797049 has 24 divisors (see below), whose sum is σ = 31628376000. Its totient is φ = 13488219360.

The previous prime is 21060797029. The next prime is 21060797059. The reversal of 21060797049 is 94079706012.

It is not a de Polignac number, because 21060797049 - 2⁸ = 21060796793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21060796995 and 21060797013.

It is not an unprimeable number, because it can be changed into a prime (21060797029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150807 + ... + 254684.

It is an arithmetic number, because the mean of its divisors is an integer number (1317849000).

Almost surely, 2^21060797049 is an apocalyptic number.

21060797049 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

21060797049 is a deficient number, since it is larger than the sum of its proper divisors (10567578951).

21060797049 is a wasteful number, since it uses less digits than its factorization.

21060797049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405725 (or 405722 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 21060797049 in words is "twenty-one billion, sixty million, seven hundred ninety-seven thousand, forty-nine".