210544387940 has 24 divisors (see below), whose sum is σ = 442153715640. Its totient is φ = 84215755008.

The previous prime is 210544387927. The next prime is 210544387951. The reversal of 210544387940 is 49783445012.

It can be written as a sum of positive squares in 4 ways, for example, as 11719361536 + 198825026404 = 108256^2 + 445898^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973646 + ... + 1170074.

It is an arithmetic number, because the mean of its divisors is an integer number (18423071485).

Almost surely, 2^210544387940 is an apocalyptic number.

210544387940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210544387940 is an abundant number, since it is smaller than the sum of its proper divisors (231609327700).

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

210544387940 is a wasteful number, since it uses less digits than its factorization.

210544387940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250031 (or 250029 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 210544387940 in words is "two hundred ten billion, five hundred forty-four million, three hundred eighty-seven thousand, nine hundred forty".