21320622154 has 16 divisors (see below), whose sum is σ = 34621332480. Its totient is φ = 9788765040.

The previous prime is 21320622121. The next prime is 21320622161. The reversal of 21320622154 is 45122602312.

21320622154 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 7 ways as a sum of consecutive naturals, for example, 2141694 + ... + 2151625.

It is an arithmetic number, because the mean of its divisors is an integer number (2163833280).

Almost surely, 2^21320622154 is an apocalyptic number.

21320622154 is a deficient number, since it is larger than the sum of its proper divisors (13300710326).

21320622154 is a wasteful number, since it uses less digits than its factorization.

21320622154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293525.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 21320622154 in words is "twenty-one billion, three hundred twenty million, six hundred twenty-two thousand, one hundred fifty-four".