210039905690 has 32 divisors (see below), whose sum is σ = 402208628544. Its totient is φ = 78699075840.

The previous prime is 210039905683. The next prime is 210039905737. The reversal of 210039905690 is 96509930012.

It is a super-2 number, since 2×210039905690² (a number of 23 digits) contains 22 as substring.

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, 2891924 + ... + 2963663.

It is an arithmetic number, because the mean of its divisors is an integer number (12569019642).

Almost surely, 2^210039905690 is an apocalyptic number.

210039905690 is a deficient number, since it is larger than the sum of its proper divisors (192168722854).

210039905690 is a wasteful number, since it uses less digits than its factorization.

210039905690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855822.

The product of its (nonzero) digits is 131220, while the sum is 44.

The spelling of 210039905690 in words is "two hundred ten billion, thirty-nine million, nine hundred five thousand, six hundred ninety".