20154500026 has 4 divisors (see below), whose sum is σ = 30231750042. Its totient is φ = 10077250012.

The previous prime is 20154499951. The next prime is 20154500027. The reversal of 20154500026 is 62000545102.

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

It can be written as a sum of positive squares in only one way, i.e., 13224770001 + 6929730025 = 114999^2 + 83245^2 .

It is not an unprimeable number, because it can be changed into a prime (20154500027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038625005 + ... + 5038625008.

Almost surely, 2^20154500026 is an apocalyptic number.

20154500026 is a deficient number, since it is larger than the sum of its proper divisors (10077250016).

20154500026 is a wasteful number, since it uses less digits than its factorization.

20154500026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10077250015.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20154500026 in words is "twenty billion, one hundred fifty-four million, five hundred thousand, twenty-six".