20748475142 has 4 divisors (see below), whose sum is σ = 31122712716. Its totient is φ = 10374237570.

The previous prime is 20748475123. The next prime is 20748475159. The reversal of 20748475142 is 24157484702.

20748475142 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 20748475093 and 20748475102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5187118784 + ... + 5187118787.

It is an arithmetic number, because the mean of its divisors is an integer number (7780678179).

Almost surely, 2^20748475142 is an apocalyptic number.

20748475142 is a deficient number, since it is larger than the sum of its proper divisors (10374237574).

20748475142 is a wasteful number, since it uses less digits than its factorization.

20748475142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374237573.

The product of its (nonzero) digits is 501760, while the sum is 44.

The spelling of 20748475142 in words is "twenty billion, seven hundred forty-eight million, four hundred seventy-five thousand, one hundred forty-two".