211926981740 has 24 divisors (see below), whose sum is σ = 445086524400. Its totient is φ = 84763199808.

The previous prime is 211926981733. The next prime is 211926981767. The reversal of 211926981740 is 47189629112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242927 + ... + 694886.

It is an arithmetic number, because the mean of its divisors is an integer number (18545271850).

Almost surely, 2^211926981740 is an apocalyptic number.

211926981740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211926981740 is an abundant number, since it is smaller than the sum of its proper divisors (233159542660).

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

211926981740 is a wasteful number, since it uses less digits than its factorization.

211926981740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949121 (or 949119 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 211926981740 in words is "two hundred eleven billion, nine hundred twenty-six million, nine hundred eighty-one thousand, seven hundred forty".