2154919094 has 4 divisors (see below), whose sum is σ = 3232378644. Its totient is φ = 1077459546.

The previous prime is 2154919087. The next prime is 2154919097. The reversal of 2154919094 is 4909194512.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154919097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538729772 + ... + 538729775.

It is an arithmetic number, because the mean of its divisors is an integer number (808094661).

Almost surely, 2^2154919094 is an apocalyptic number.

2154919094 is a deficient number, since it is larger than the sum of its proper divisors (1077459550).

2154919094 is a wasteful number, since it uses less digits than its factorization.

2154919094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077459549.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 2154919094 is about 46421.1061264162. The cubic root of 2154919094 is about 1291.6464552777.

The spelling of 2154919094 in words is "two billion, one hundred fifty-four million, nine hundred nineteen thousand, ninety-four".