20757853 has 2 divisors, whose sum is σ = 20757854. Its totient is φ = 20757852.

The previous prime is 20757809. The next prime is 20757857. The reversal of 20757853 is 35875702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20548089 + 209764 = 4533^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 20757853 - 2¹³ = 20749661 is a prime.

It is a super-2 number, since 2×20757853² = 861776922339218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20757857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10378926 + 10378927.

It is an arithmetic number, because the mean of its divisors is an integer number (10378927).

Almost surely, 2^20757853 is an apocalyptic number.

It is an amenable number.

20757853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20757853 is an equidigital number, since it uses as much as digits as its factorization.

20757853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 20757853 is about 4556.0786867656. The cubic root of 20757853 is about 274.8278945162.

The spelling of 20757853 in words is "twenty million, seven hundred fifty-seven thousand, eight hundred fifty-three".