20443100004 has 48 divisors (see below), whose sum is σ = 54000656640. Its totient is φ = 6685791840.

The previous prime is 20443100003. The next prime is 20443100021. The reversal of 20443100004 is 40000134402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 20443100004.

It is not an unprimeable number, because it can be changed into a prime (20443100003) 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, 1780012 + ... + 1791459.

It is an arithmetic number, because the mean of its divisors is an integer number (1125013680).

Almost surely, 2^20443100004 is an apocalyptic number.

It is an amenable number.

20443100004 is an abundant number, since it is smaller than the sum of its proper divisors (33557556636).

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

20443100004 is a wasteful number, since it uses less digits than its factorization.

20443100004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571537 (or 3571529 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20443100004 its reverse (40000134402), we get a palindrome (60443234406).

The spelling of 20443100004 in words is "twenty billion, four hundred forty-three million, one hundred thousand, four".