16620681734 has 16 divisors (see below), whose sum is σ = 25097791680. Its totient is φ = 8254921920.

The previous prime is 16620681689. The next prime is 16620681761. The reversal of 16620681734 is 43718602661.

It is a super-2 number, since 2×16620681734² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent 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, 153827 + ... + 238545.

It is an arithmetic number, because the mean of its divisors is an integer number (1568611980).

Almost surely, 2^16620681734 is an apocalyptic number.

16620681734 is a deficient number, since it is larger than the sum of its proper divisors (8477109946).

16620681734 is a wasteful number, since it uses less digits than its factorization.

16620681734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85375.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 16620681734 in words is "sixteen billion, six hundred twenty million, six hundred eighty-one thousand, seven hundred thirty-four".