20267436534 has 64 divisors (see below), whose sum is σ = 43436736000. Its totient is φ = 6285945600.

The previous prime is 20267436523. The next prime is 20267436569. The reversal of 20267436534 is 43563476202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1525432 + ... + 1538660.

It is an arithmetic number, because the mean of its divisors is an integer number (678699000).

Almost surely, 2^20267436534 is an apocalyptic number.

20267436534 is an abundant number, since it is smaller than the sum of its proper divisors (23169299466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20267436534 is a wasteful number, since it uses less digits than its factorization.

20267436534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13493.

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 20267436534 in words is "twenty billion, two hundred sixty-seven million, four hundred thirty-six thousand, five hundred thirty-four".