20830340487 has 16 divisors (see below), whose sum is σ = 31343460480. Its totient is φ = 12189122400.

The previous prime is 20830340473. The next prime is 20830340569. The reversal of 20830340487 is 78404303802.

It is a de Polignac number, because none of the positive numbers 2^k-20830340487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830340387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10882189 + ... + 10884102.

It is an arithmetic number, because the mean of its divisors is an integer number (1958966280).

Almost surely, 2^20830340487 is an apocalyptic number.

20830340487 is a deficient number, since it is larger than the sum of its proper divisors (10513119993).

20830340487 is a wasteful number, since it uses less digits than its factorization.

20830340487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21766334.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 20830340487 in words is "twenty billion, eight hundred thirty million, three hundred forty thousand, four hundred eighty-seven".