20135144004 has 48 divisors (see below), whose sum is σ = 47278812672. Its totient is φ = 6669448192.

The previous prime is 20135143969. The next prime is 20135144023. The reversal of 20135144004 is 40044153102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1233037 + ... + 1249259.

It is an arithmetic number, because the mean of its divisors is an integer number (984975264).

Almost surely, 2^20135144004 is an apocalyptic number.

It is an amenable number.

20135144004 is an abundant number, since it is smaller than the sum of its proper divisors (27143668668).

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

20135144004 is a wasteful number, since it uses less digits than its factorization.

20135144004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16876 (or 16874 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20135144004 its reverse (40044153102), we get a palindrome (60179297106).

The spelling of 20135144004 in words is "twenty billion, one hundred thirty-five million, one hundred forty-four thousand, four".