20687145350 has 12 divisors (see below), whose sum is σ = 38478090444. Its totient is φ = 8274858120.

The previous prime is 20687145319. The next prime is 20687145359. The reversal of 20687145350 is 5354178602.

20687145350 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 20687145298 and 20687145307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20687145359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206871404 + ... + 206871503.

It is an arithmetic number, because the mean of its divisors is an integer number (3206507537).

Almost surely, 2^20687145350 is an apocalyptic number.

20687145350 is a deficient number, since it is larger than the sum of its proper divisors (17790945094).

20687145350 is a wasteful number, since it uses less digits than its factorization.

20687145350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413742919 (or 413742914 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 20687145350 in words is "twenty billion, six hundred eighty-seven million, one hundred forty-five thousand, three hundred fifty".