16530020774 has 16 divisors (see below), whose sum is σ = 25160194080. Its totient is φ = 8143437120.

The previous prime is 16530020753. The next prime is 16530020777. The reversal of 16530020774 is 47702003561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16530020777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192962 + ... + 265130.

It is an arithmetic number, because the mean of its divisors is an integer number (1572512130).

Almost surely, 2^16530020774 is an apocalyptic number.

16530020774 is a deficient number, since it is larger than the sum of its proper divisors (8630173306).

16530020774 is a wasteful number, since it uses less digits than its factorization.

16530020774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73855.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 16530020774 in words is "sixteen billion, five hundred thirty million, twenty thousand, seven hundred seventy-four".