21893828773 has 2 divisors, whose sum is σ = 21893828774. Its totient is φ = 21893828772.

The previous prime is 21893828729. The next prime is 21893828837. The reversal of 21893828773 is 37782839812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21891569764 + 2259009 = 147958^2 + 1503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21893828773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21893828713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10946914386 + 10946914387.

It is an arithmetic number, because the mean of its divisors is an integer number (10946914387).

Almost surely, 2^21893828773 is an apocalyptic number.

It is an amenable number.

21893828773 is a deficient number, since it is larger than the sum of its proper divisors (1).

21893828773 is an equidigital number, since it uses as much as digits as its factorization.

21893828773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 58.

The spelling of 21893828773 in words is "twenty-one billion, eight hundred ninety-three million, eight hundred twenty-eight thousand, seven hundred seventy-three".