20709179142 has 16 divisors (see below), whose sum is σ = 42036543552. Its totient is φ = 6800028840.

The previous prime is 20709179129. The next prime is 20709179159. The reversal of 20709179142 is 24197190702.

It is a super-3 number, since 3×20709179142³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20709179094 and 20709179103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25757284 + ... + 25758087.

It is an arithmetic number, because the mean of its divisors is an integer number (2627283972).

Almost surely, 2^20709179142 is an apocalyptic number.

20709179142 is an abundant number, since it is smaller than the sum of its proper divisors (21327364410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20709179142 is a wasteful number, since it uses less digits than its factorization.

20709179142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51515443.

The product of its (nonzero) digits is 63504, while the sum is 42.

The spelling of 20709179142 in words is "twenty billion, seven hundred nine million, one hundred seventy-nine thousand, one hundred forty-two".