211023440020 has 48 divisors (see below), whose sum is σ = 451882488960. Its totient is φ = 82748521856.

The previous prime is 211023439999. The next prime is 211023440051. The reversal of 211023440020 is 20044320112.

It is a self number, because there is not a number n which added to its sum of digits gives 211023440020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1214991 + ... + 1377769.

It is an arithmetic number, because the mean of its divisors is an integer number (9414218520).

Almost surely, 2^211023440020 is an apocalyptic number.

211023440020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211023440020 is an abundant number, since it is smaller than the sum of its proper divisors (240859048940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211023440020 is a wasteful number, since it uses less digits than its factorization.

211023440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164064 (or 164062 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 211023440020 its reverse (20044320112), we get a palindrome (231067760132).

The spelling of 211023440020 in words is "two hundred eleven billion, twenty-three million, four hundred forty thousand, twenty".