20154256134 has 8 divisors (see below), whose sum is σ = 40308512280. Its totient is φ = 6718085376.

The previous prime is 20154256123. The next prime is 20154256139. The reversal of 20154256134 is 43165245102.

It is a sphenic number, since it is the product of 3 distinct primes.

20154256134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20154256095 and 20154256104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154256139) 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, 1679521339 + ... + 1679521350.

It is an arithmetic number, because the mean of its divisors is an integer number (5038564035).

Almost surely, 2^20154256134 is an apocalyptic number.

20154256134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20154256134 is a wasteful number, since it uses less digits than its factorization.

20154256134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359042694.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 20154256134 in words is "twenty billion, one hundred fifty-four million, two hundred fifty-six thousand, one hundred thirty-four".