2154023538 has 16 divisors (see below), whose sum is σ = 4311709056. Its totient is φ = 717397520.

The previous prime is 2154023513. The next prime is 2154023549. The reversal of 2154023538 is 8353204512.

It is a junction number, because it is equal to n+sod(n) for n = 2154023499 and 2154023508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144906 + ... + 159077.

It is an arithmetic number, because the mean of its divisors is an integer number (269481816).

Almost surely, 2^2154023538 is an apocalyptic number.

2154023538 is an abundant number, since it is smaller than the sum of its proper divisors (2157685518).

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

2154023538 is a wasteful number, since it uses less digits than its factorization.

2154023538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305169.

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

The square root of 2154023538 is about 46411.4591237983. The cubic root of 2154023538 is about 1291.4675000653.

The spelling of 2154023538 in words is "two billion, one hundred fifty-four million, twenty-three thousand, five hundred thirty-eight".