21116454004 has 24 divisors (see below), whose sum is σ = 38917821600. Its totient is φ = 9997621920.

The previous prime is 21116453887. The next prime is 21116454013. The reversal of 21116454004 is 40045461112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90099 + ... + 224389.

It is an arithmetic number, because the mean of its divisors is an integer number (1621575900).

Almost surely, 2^21116454004 is an apocalyptic number.

It is an amenable number.

21116454004 is a deficient number, since it is larger than the sum of its proper divisors (17801367596).

21116454004 is a wasteful number, since it uses less digits than its factorization.

21116454004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136383 (or 136381 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 21116454004 in words is "twenty-one billion, one hundred sixteen million, four hundred fifty-four thousand, four".