20154126254 has 4 divisors (see below), whose sum is σ = 30231189384. Its totient is φ = 10077063126.

The previous prime is 20154126247. The next prime is 20154126271. The reversal of 20154126254 is 45262145102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20154126254.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038531562 + ... + 5038531565.

It is an arithmetic number, because the mean of its divisors is an integer number (7557797346).

Almost surely, 2^20154126254 is an apocalyptic number.

20154126254 is a deficient number, since it is larger than the sum of its proper divisors (10077063130).

20154126254 is a wasteful number, since it uses less digits than its factorization.

20154126254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10077063129.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 20154126254 in words is "twenty billion, one hundred fifty-four million, one hundred twenty-six thousand, two hundred fifty-four".