210723776340 has 384 divisors, whose sum is σ = 746880196608. Its totient is φ = 43121541120.

The previous prime is 210723776339. The next prime is 210723776359. The reversal of 210723776340 is 43677327012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 210723776292 and 210723776301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 87182812 + ... + 87185228.

It is an arithmetic number, because the mean of its divisors is an integer number (1945000512).

Almost surely, 2^210723776340 is an apocalyptic number.

210723776340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210723776340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373440098304).

210723776340 is an abundant number, since it is smaller than the sum of its proper divisors (536156420268).

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

210723776340 is a wasteful number, since it uses less digits than its factorization.

210723776340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727 (or 2725 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 42.

The spelling of 210723776340 in words is "two hundred ten billion, seven hundred twenty-three million, seven hundred seventy-six thousand, three hundred forty".