21920262853901 has 2 divisors, whose sum is σ = 21920262853902. Its totient is φ = 21920262853900.

The previous prime is 21920262853889. The next prime is 21920262853963. The reversal of 21920262853901 is 10935826202912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20461238028100 + 1459024825801 = 4523410^2 + 1207901^2 .

It is a cyclic number.

It is not a de Polignac number, because 21920262853901 - 2⁶ = 21920262853837 is a prime.

It is a super-2 number, since 2×21920262853901² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21920262853901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21920262843901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10960131426950 + 10960131426951.

It is an arithmetic number, because the mean of its divisors is an integer number (10960131426951).

Almost surely, 2^{21920262853901} is an apocalyptic number.

It is an amenable number.

21920262853901 is a deficient number, since it is larger than the sum of its proper divisors (1).

21920262853901 is an equidigital number, since it uses as much as digits as its factorization.

21920262853901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 21920262853901 in words is "twenty-one trillion, nine hundred twenty billion, two hundred sixty-two million, eight hundred fifty-three thousand, nine hundred one".