21279180034 has 32 divisors (see below), whose sum is σ = 37293517440. Its totient is φ = 8917907328.

The previous prime is 21279179969. The next prime is 21279180077. The reversal of 21279180034 is 43008197212.

It is a junction number, because it is equal to n+sod(n) for n = 21279179975 and 21279180002.

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, 45712 + ... + 211300.

It is an arithmetic number, because the mean of its divisors is an integer number (1165422420).

Almost surely, 2^21279180034 is an apocalyptic number.

21279180034 is a deficient number, since it is larger than the sum of its proper divisors (16014337406).

21279180034 is a wasteful number, since it uses less digits than its factorization.

21279180034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165802.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 21279180034 in words is "twenty-one billion, two hundred seventy-nine million, one hundred eighty thousand, thirty-four".