21071607234 has 32 divisors (see below), whose sum is σ = 43640778240. Its totient is φ = 6774768000.

The previous prime is 21071607229. The next prime is 21071607239. The reversal of 21071607234 is 43270617012.

It is an interprime number because it is at equal distance from previous prime (21071607229) and next prime (21071607239).

It is a super-2 number, since 2×21071607234² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21071607195 and 21071607204.

It is not an unprimeable number, because it can be changed into a prime (21071607239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111334 + ... + 233534.

It is an arithmetic number, because the mean of its divisors is an integer number (1363774320).

Almost surely, 2^21071607234 is an apocalyptic number.

21071607234 is an abundant number, since it is smaller than the sum of its proper divisors (22569171006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21071607234 is a wasteful number, since it uses less digits than its factorization.

21071607234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123226.

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 21071607234 in words is "twenty-one billion, seventy-one million, six hundred seven thousand, two hundred thirty-four".