20154256142 has 8 divisors (see below), whose sum is σ = 30238665600. Its totient is φ = 10074700944.

The previous prime is 20154256141. The next prime is 20154256249. The reversal of 20154256142 is 24165245102.

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 = 20154256099 and 20154256108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154256141) 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, 1203167 + ... + 1219802.

It is an arithmetic number, because the mean of its divisors is an integer number (3779833200).

Almost surely, 2^20154256142 is an apocalyptic number.

20154256142 is a deficient number, since it is larger than the sum of its proper divisors (10084409458).

20154256142 is a wasteful number, since it uses less digits than its factorization.

20154256142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427130.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 20154256142 in words is "twenty billion, one hundred fifty-four million, two hundred fifty-six thousand, one hundred forty-two".