20150658394 has 4 divisors (see below), whose sum is σ = 30225987594. Its totient is φ = 10075329196.

The previous prime is 20150658391. The next prime is 20150658401. The reversal of 20150658394 is 49385605102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49385605102 = 2 ⋅24692802551.

It can be written as a sum of positive squares in only one way, i.e., 17282520369 + 2868138025 = 131463^2 + 53555^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20150658394.

It is not an unprimeable number, because it can be changed into a prime (20150658391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5037664597 + ... + 5037664600.

Almost surely, 2^20150658394 is an apocalyptic number.

20150658394 is a deficient number, since it is larger than the sum of its proper divisors (10075329200).

20150658394 is a wasteful number, since it uses less digits than its factorization.

20150658394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075329199.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 20150658394 in words is "twenty billion, one hundred fifty million, six hundred fifty-eight thousand, three hundred ninety-four".