20516935007 has 4 divisors (see below), whose sum is σ = 20518163736. Its totient is φ = 20515706280.

The previous prime is 20516934979. The next prime is 20516935013. The reversal of 20516935007 is 70053961502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20516935007 - 2¹⁸ = 20516672863 is a prime.

It is a super-3 number, since 3×20516935007³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516935057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588968 + ... + 622829.

It is an arithmetic number, because the mean of its divisors is an integer number (5129540934).

Almost surely, 2^20516935007 is an apocalyptic number.

20516935007 is a deficient number, since it is larger than the sum of its proper divisors (1228729).

20516935007 is a wasteful number, since it uses less digits than its factorization.

20516935007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228728.

The product of its (nonzero) digits is 56700, while the sum is 38.

The spelling of 20516935007 in words is "twenty billion, five hundred sixteen million, nine hundred thirty-five thousand, seven".