20416837523 has 4 divisors (see below), whose sum is σ = 20429528280. Its totient is φ = 20404146768.

The previous prime is 20416837489. The next prime is 20416837559. The reversal of 20416837523 is 32573861402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20416837523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20416837583) 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, 6342965 + ... + 6346182.

It is an arithmetic number, because the mean of its divisors is an integer number (5107382070).

Almost surely, 2^20416837523 is an apocalyptic number.

20416837523 is a deficient number, since it is larger than the sum of its proper divisors (12690757).

20416837523 is a wasteful number, since it uses less digits than its factorization.

20416837523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12690756.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 20416837523 in words is "twenty billion, four hundred sixteen million, eight hundred thirty-seven thousand, five hundred twenty-three".