20154126253 has 4 divisors (see below), whose sum is σ = 21214869760. Its totient is φ = 19093382748.

The previous prime is 20154126247. The next prime is 20154126271. The reversal of 20154126253 is 35262145102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20154126253 - 2¹⁷ = 20153995181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154126283) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 530371725 + ... + 530371762.

It is an arithmetic number, because the mean of its divisors is an integer number (5303717440).

Almost surely, 2^20154126253 is an apocalyptic number.

It is an amenable number.

20154126253 is a deficient number, since it is larger than the sum of its proper divisors (1060743507).

20154126253 is a wasteful number, since it uses less digits than its factorization.

20154126253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060743506.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 20154126253 in words is "twenty billion, one hundred fifty-four million, one hundred twenty-six thousand, two hundred fifty-three".