20540626 has 4 divisors (see below), whose sum is σ = 30810942. Its totient is φ = 10270312.

The previous prime is 20540609. The next prime is 20540629. The reversal of 20540626 is 62604502.

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., 18481401 + 2059225 = 4299^2 + 1435^2 .

It is a super-3 number, since 3×20540626³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20540626.

It is not an unprimeable number, because it can be changed into a prime (20540629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5135155 + ... + 5135158.

Almost surely, 2^20540626 is an apocalyptic number.

20540626 is a deficient number, since it is larger than the sum of its proper divisors (10270316).

20540626 is a wasteful number, since it uses less digits than its factorization.

20540626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10270315.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20540626 is about 4532.1767397135. The cubic root of 20540626 is about 273.8658568696.

The spelling of 20540626 in words is "twenty million, five hundred forty thousand, six hundred twenty-six".