20154663142 has 8 divisors (see below), whose sum is σ = 30233550600. Its totient is φ = 10076812944.

The previous prime is 20154663131. The next prime is 20154663149. The reversal of 20154663142 is 24136645102.

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 = 20154663098 and 20154663107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154663149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208767 + ... + 289642.

It is an arithmetic number, because the mean of its divisors is an integer number (3779193825).

Almost surely, 2^20154663142 is an apocalyptic number.

20154663142 is a deficient number, since it is larger than the sum of its proper divisors (10078887458).

20154663142 is a wasteful number, since it uses less digits than its factorization.

20154663142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518630.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20154663142 in words is "twenty billion, one hundred fifty-four million, six hundred sixty-three thousand, one hundred forty-two".