20105534634 has 32 divisors (see below), whose sum is σ = 40518959616. Its totient is φ = 6650715120.

The previous prime is 20105534633. The next prime is 20105534693. The reversal of 20105534634 is 43643550102.

It is a junction number, because it is equal to n+sod(n) for n = 20105534595 and 20105534604.

It is not an unprimeable number, because it can be changed into a prime (20105534633) 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, 416419 + ... + 462185.

It is an arithmetic number, because the mean of its divisors is an integer number (1266217488).

Almost surely, 2^20105534634 is an apocalyptic number.

20105534634 is an abundant number, since it is smaller than the sum of its proper divisors (20413424982).

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

20105534634 is a wasteful number, since it uses less digits than its factorization.

20105534634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46330.

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 20105534634 in words is "twenty billion, one hundred five million, five hundred thirty-four thousand, six hundred thirty-four".