21130042400004 has 12 divisors (see below), whose sum is σ = 49303432266704. Its totient is φ = 7043347466664.

The previous prime is 21130042399943. The next prime is 21130042400009. The reversal of 21130042400004 is 40000424003112.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21130042400009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880418433322 + ... + 880418433345.

Almost surely, 2^{21130042400004} is an apocalyptic number.

It is an amenable number.

21130042400004 is an abundant number, since it is smaller than the sum of its proper divisors (28173389866700).

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

21130042400004 is a wasteful number, since it uses less digits than its factorization.

21130042400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760836866674 (or 1760836866672 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21130042400004 its reverse (40000424003112), we get a palindrome (61130466403116).

The spelling of 21130042400004 in words is "twenty-one trillion, one hundred thirty billion, forty-two million, four hundred thousand, four".