20267754815 has 16 divisors (see below), whose sum is σ = 30322667520. Its totient is φ = 12634444320.

The previous prime is 20267754797. The next prime is 20267754817. The reversal of 20267754815 is 51845776202.

It is not a de Polignac number, because 20267754815 - 2¹⁶ = 20267689279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20267754815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20267754817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26321375 + ... + 26322144.

It is an arithmetic number, because the mean of its divisors is an integer number (1895166720).

Almost surely, 2^20267754815 is an apocalyptic number.

20267754815 is a deficient number, since it is larger than the sum of its proper divisors (10054912705).

20267754815 is a wasteful number, since it uses less digits than its factorization.

20267754815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52643542.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 20267754815 in words is "twenty billion, two hundred sixty-seven million, seven hundred fifty-four thousand, eight hundred fifteen".