20423255335142 has 32 divisors (see below), whose sum is σ = 33819514844544. Its totient is φ = 9172894369600.

The previous prime is 20423255335129. The next prime is 20423255335177. The reversal of 20423255335142 is 24153355232402.

It is a self number, because there is not a number n which added to its sum of digits gives 20423255335142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14535548 + ... + 15878559.

It is an arithmetic number, because the mean of its divisors is an integer number (1056859838892).

Almost surely, 2^{20423255335142} is an apocalyptic number.

20423255335142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20423255335142 is a deficient number, since it is larger than the sum of its proper divisors (13396259509402).

20423255335142 is a wasteful number, since it uses less digits than its factorization.

20423255335142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30414484.

The product of its (nonzero) digits is 864000, while the sum is 41.

The spelling of 20423255335142 in words is "twenty trillion, four hundred twenty-three billion, two hundred fifty-five million, three hundred thirty-five thousand, one hundred forty-two".