21630043323626 has 4 divisors (see below), whose sum is σ = 32445064985442. Its totient is φ = 10815021661812.

The previous prime is 21630043323613. The next prime is 21630043323649. The reversal of 21630043323626 is 62632334003612.

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., 21028635318601 + 601408005025 = 4585699^2 + 775505^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5407510830905 + ... + 5407510830908.

Almost surely, 2^{21630043323626} is an apocalyptic number.

21630043323626 is a deficient number, since it is larger than the sum of its proper divisors (10815021661816).

21630043323626 is a wasteful number, since it uses less digits than its factorization.

21630043323626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10815021661815.

The product of its (nonzero) digits is 559872, while the sum is 41.

The spelling of 21630043323626 in words is "twenty-one trillion, six hundred thirty billion, forty-three million, three hundred twenty-three thousand, six hundred twenty-six".