20243616 has 48 divisors (see below), whose sum is σ = 53371584. Its totient is φ = 6718464.

The previous prime is 20243603. The next prime is 20243621. The reversal of 20243616 is 61634202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41325 + ... + 41811.

It is an arithmetic number, because the mean of its divisors is an integer number (1111908).

Almost surely, 2^20243616 is an apocalyptic number.

20243616 is the 2598-th octagonal number.

It is an amenable number.

20243616 is an abundant number, since it is smaller than the sum of its proper divisors (33127968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20243616 is a wasteful number, since it uses less digits than its factorization.

20243616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20243616 is about 4499.2906107519. The cubic root of 20243616 is about 272.5394427097.

Adding to 20243616 its reverse (61634202), we get a palindrome (81877818).

The spelling of 20243616 in words is "twenty million, two hundred forty-three thousand, six hundred sixteen".