21626060234 has 4 divisors (see below), whose sum is σ = 32439090354. Its totient is φ = 10813030116.

The previous prime is 21626060221. The next prime is 21626060237. The reversal of 21626060234 is 43206062612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12313231225 + 9312829009 = 110965^2 + 96503^2 .

It is a super-2 number, since 2×21626060234² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21626060234.

It is not an unprimeable number, because it can be changed into a prime (21626060237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5406515057 + ... + 5406515060.

Almost surely, 2^21626060234 is an apocalyptic number.

21626060234 is a deficient number, since it is larger than the sum of its proper divisors (10813030120).

21626060234 is a wasteful number, since it uses less digits than its factorization.

21626060234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10813030119.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 21626060234 in words is "twenty-one billion, six hundred twenty-six million, sixty thousand, two hundred thirty-four".