900020220893 has 2 divisors, whose sum is σ = 900020220894. Its totient is φ = 900020220892.

The previous prime is 900020220889. The next prime is 900020220901. The reversal of 900020220893 is 398022020009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757225414969 + 142794805924 = 870187^2 + 377882^2 .

It is an emirp because it is prime and its reverse (398022020009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900020220893 - 2² = 900020220889 is a prime.

It is a super-4 number, since 4×900020220893⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900020220863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450010110446 + 450010110447.

It is an arithmetic number, because the mean of its divisors is an integer number (450010110447).

Almost surely, 2^900020220893 is an apocalyptic number.

It is an amenable number.

900020220893 is a deficient number, since it is larger than the sum of its proper divisors (1).

900020220893 is an equidigital number, since it uses as much as digits as its factorization.

900020220893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 900020220893 in words is "nine hundred billion, twenty million, two hundred twenty thousand, eight hundred ninety-three".