20516235974 has 12 divisors (see below), whose sum is σ = 33323709276. Its totient is φ = 9469031832.

The previous prime is 20516235917. The next prime is 20516235983. The reversal of 20516235974 is 47953261502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30349124 + ... + 30349799.

It is an arithmetic number, because the mean of its divisors is an integer number (2776975773).

Almost surely, 2^20516235974 is an apocalyptic number.

20516235974 is a deficient number, since it is larger than the sum of its proper divisors (12807473302).

20516235974 is a wasteful number, since it uses less digits than its factorization.

20516235974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60698951 (or 60698938 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 20516235974 in words is "twenty billion, five hundred sixteen million, two hundred thirty-five thousand, nine hundred seventy-four".