20489626 has 4 divisors (see below), whose sum is σ = 30734442. Its totient is φ = 10244812.

The previous prime is 20489621. The next prime is 20489647. The reversal of 20489626 is 62698402.

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., 17430625 + 3059001 = 4175^2 + 1749^2 .

It is not an unprimeable number, because it can be changed into a prime (20489621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5122405 + ... + 5122408.

Almost surely, 2^20489626 is an apocalyptic number.

20489626 is a deficient number, since it is larger than the sum of its proper divisors (10244816).

20489626 is a wasteful number, since it uses less digits than its factorization.

20489626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10244815.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20489626 is about 4526.5468074460. The cubic root of 20489626 is about 273.6390099325.

It can be divided in two parts, 20489 and 626, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20489626 in words is "twenty million, four hundred eighty-nine thousand, six hundred twenty-six".