21000433012004 has 36 divisors (see below), whose sum is σ = 37554488423424. Its totient is φ = 10274830316352.

The previous prime is 21000433012003. The next prime is 21000433012021. The reversal of 21000433012004 is 40021033400012.

It is not an unprimeable number, because it can be changed into a prime (21000433012003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1171592 + ... + 6585855.

It is an arithmetic number, because the mean of its divisors is an integer number (1043180233984).

Almost surely, 2^{21000433012004} is an apocalyptic number.

It is an amenable number.

21000433012004 is a deficient number, since it is larger than the sum of its proper divisors (16554055411420).

21000433012004 is a wasteful number, since it uses less digits than its factorization.

21000433012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7757724 (or 7757649 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21000433012004 its reverse (40021033400012), we get a palindrome (61021466412016).

The spelling of 21000433012004 in words is "twenty-one trillion, four hundred thirty-three million, twelve thousand, four".