20404102004 has 24 divisors (see below), whose sum is σ = 41949693408. Its totient is φ = 8561161440.

The previous prime is 20404101929. The next prime is 20404102007. The reversal of 20404102004 is 40020140402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404102007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17835182 + ... + 17836325.

It is an arithmetic number, because the mean of its divisors is an integer number (1747903892).

Almost surely, 2^20404102004 is an apocalyptic number.

It is an amenable number.

20404102004 is an abundant number, since it is smaller than the sum of its proper divisors (21545591404).

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

20404102004 is a wasteful number, since it uses less digits than its factorization.

20404102004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35671535 (or 35671533 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20404102004 its reverse (40020140402), we get a palindrome (60424242406).

The spelling of 20404102004 in words is "twenty billion, four hundred four million, one hundred two thousand, four".