21226603078 has 16 divisors (see below), whose sum is σ = 33477878016. Its totient is φ = 10074355720.

The previous prime is 21226603063. The next prime is 21226603109. The reversal of 21226603078 is 87030662212.

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, 1755226 + ... + 1767277.

It is an arithmetic number, because the mean of its divisors is an integer number (2092367376).

Almost surely, 2^21226603078 is an apocalyptic number.

21226603078 is a deficient number, since it is larger than the sum of its proper divisors (12251274938).

21226603078 is a wasteful number, since it uses less digits than its factorization.

21226603078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522659.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 21226603078 in words is "twenty-one billion, two hundred twenty-six million, six hundred three thousand, seventy-eight".