20861303142 has 16 divisors (see below), whose sum is σ = 41734950912. Its totient is φ = 6951710280.

The previous prime is 20861303123. The next prime is 20861303201. The reversal of 20861303142 is 24130316802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492318 + ... + 533009.

It is an arithmetic number, because the mean of its divisors is an integer number (2608434432).

Almost surely, 2^20861303142 is an apocalyptic number.

20861303142 is an abundant number, since it is smaller than the sum of its proper divisors (20873647770).

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

20861303142 is a wasteful number, since it uses less digits than its factorization.

20861303142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028723.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 20861303142 its reverse (24130316802), we get a palindrome (44991619944).

The spelling of 20861303142 in words is "twenty billion, eight hundred sixty-one million, three hundred three thousand, one hundred forty-two".