20408142873 has 16 divisors (see below), whose sum is σ = 28329122816. Its totient is φ = 13056370560.

The previous prime is 20408142863. The next prime is 20408142913. The reversal of 20408142873 is 37824180402.

It is not a de Polignac number, because 20408142873 - 2⁸ = 20408142617 is a prime.

It is a super-3 number, since 3×20408142873³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20408142803) 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, 1251193 + ... + 1267398.

It is an arithmetic number, because the mean of its divisors is an integer number (1770570176).

Almost surely, 2^20408142873 is an apocalyptic number.

It is an amenable number.

20408142873 is a deficient number, since it is larger than the sum of its proper divisors (7920979943).

20408142873 is a wasteful number, since it uses less digits than its factorization.

20408142873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518704.

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 20408142873 in words is "twenty billion, four hundred eight million, one hundred forty-two thousand, eight hundred seventy-three".