21116487370 has 32 divisors (see below), whose sum is σ = 42247474560. Its totient is φ = 7533839040.

The previous prime is 21116487361. The next prime is 21116487383. The reversal of 21116487370 is 7378461112.

It is a happy number.

21116487370 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 1805190 + ... + 1816849.

It is an arithmetic number, because the mean of its divisors is an integer number (1320233580).

Almost surely, 2^21116487370 is an apocalyptic number.

21116487370 is an abundant number, since it is smaller than the sum of its proper divisors (21130987190).

21116487370 is a wasteful number, since it uses less digits than its factorization.

21116487370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622110.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 21116487370 in words is "twenty-one billion, one hundred sixteen million, four hundred eighty-seven thousand, three hundred seventy".