20154092678838 has 80 divisors (see below), whose sum is σ = 46631648802816. Its totient is φ = 6499259668080.

The previous prime is 20154092678833. The next prime is 20154092678851. The reversal of 20154092678838 is 83887629045102.

20154092678838 is a `hidden beast` number, since 2 + 0 + 1 + 540 + 9 + 2 + 6 + 7 + 8 + 83 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154092678833) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15250195 + ... + 16518977.

It is a 1-persistent number, because it is pandigital, but 2⋅20154092678838 = 40308185357676 is not.

Almost surely, 2^{20154092678838} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20154092678838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23315824401408).

20154092678838 is an abundant number, since it is smaller than the sum of its proper divisors (26477556123978).

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

20154092678838 is a wasteful number, since it uses less digits than its factorization.

20154092678838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271991 (or 1271982 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 20154092678838 in words is "twenty trillion, one hundred fifty-four billion, ninety-two million, six hundred seventy-eight thousand, eight hundred thirty-eight".