20043215105 has 32 divisors (see below), whose sum is σ = 25937936640. Its totient is φ = 14830520320.

The previous prime is 20043215099. The next prime is 20043215113. The reversal of 20043215105 is 50151234002.

It is not a de Polignac number, because 20043215105 - 2⁴ = 20043215089 is a prime.

It is a super-2 number, since 2×20043215105² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 513986 + ... + 551604.

It is an arithmetic number, because the mean of its divisors is an integer number (810560520).

Almost surely, 2^20043215105 is an apocalyptic number.

It is an amenable number.

20043215105 is a deficient number, since it is larger than the sum of its proper divisors (5894721535).

20043215105 is a wasteful number, since it uses less digits than its factorization.

20043215105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37801.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20043215105 its reverse (50151234002), we get a palindrome (70194449107).

The spelling of 20043215105 in words is "twenty billion, forty-three million, two hundred fifteen thousand, one hundred five".