21797144013 has 16 divisors (see below), whose sum is σ = 29219328000. Its totient is φ = 14453247600.

The previous prime is 21797144011. The next prime is 21797144027. The reversal of 21797144013 is 31044179712.

It is not a de Polignac number, because 21797144013 - 2¹ = 21797144011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21797144011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2430688 + ... + 2439638.

It is an arithmetic number, because the mean of its divisors is an integer number (1826208000).

Almost surely, 2^21797144013 is an apocalyptic number.

It is an amenable number.

21797144013 is a deficient number, since it is larger than the sum of its proper divisors (7422183987).

21797144013 is a wasteful number, since it uses less digits than its factorization.

21797144013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13232.

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 21797144013 in words is "twenty-one billion, seven hundred ninety-seven million, one hundred forty-four thousand, thirteen".