20519343142 has 8 divisors (see below), whose sum is σ = 32117232816. Its totient is φ = 9813598872.

The previous prime is 20519343109. The next prime is 20519343149. The reversal of 20519343142 is 24134391502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20519343098 and 20519343107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519343149) 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, 223036293 + ... + 223036384.

It is an arithmetic number, because the mean of its divisors is an integer number (4014654102).

Almost surely, 2^20519343142 is an apocalyptic number.

20519343142 is a deficient number, since it is larger than the sum of its proper divisors (11597889674).

20519343142 is a wasteful number, since it uses less digits than its factorization.

20519343142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446072702.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20519343142 in words is "twenty billion, five hundred nineteen million, three hundred forty-three thousand, one hundred forty-two".