20001626 has 4 divisors (see below), whose sum is σ = 30002442. Its totient is φ = 10000812.

The previous prime is 20001613. The next prime is 20001659. The reversal of 20001626 is 62610002.

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., 16410601 + 3591025 = 4051^2 + 1895^2 .

20001626 is a modest number, since divided by 1626 gives 200 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000405 + ... + 5000408.

Almost surely, 2^20001626 is an apocalyptic number.

20001626 is a deficient number, since it is larger than the sum of its proper divisors (10000816).

20001626 is a wasteful number, since it uses less digits than its factorization.

20001626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000815.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20001626 is about 4472.3177436314. The cubic root of 20001626 is about 271.4491175319.

Adding to 20001626 its reverse (62610002), we get a palindrome (82611628).

The spelling of 20001626 in words is "twenty million, one thousand, six hundred twenty-six".