20426516 has 24 divisors (see below), whose sum is σ = 40053216. Its totient is φ = 9033120.

The previous prime is 20426513. The next prime is 20426533. The reversal of 20426516 is 61562402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4646 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (1668884).

Almost surely, 2^20426516 is an apocalyptic number.

It is an amenable number.

20426516 is a deficient number, since it is larger than the sum of its proper divisors (19626700).

20426516 is a wasteful number, since it uses less digits than its factorization.

20426516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12599 (or 12597 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20426516 is about 4519.5703335605. The cubic root of 20426516 is about 273.3577762529.

Adding to 20426516 its reverse (61562402), we get a palindrome (81988918).

It can be divided in two parts, 2042 and 6516, that added together give a palindrome (8558).

The spelling of 20426516 in words is "twenty million, four hundred twenty-six thousand, five hundred sixteen".