20743568 has 10 divisors (see below), whose sum is σ = 40190694. Its totient is φ = 10371776.

The previous prime is 20743559. The next prime is 20743577. The reversal of 20743568 is 86534702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20743559) and next prime (20743577).

It can be written as a sum of positive squares in only one way, i.e., 20178064 + 565504 = 4492^2 + 752^2 .

It is a super-2 number, since 2×20743568² = 860591226741248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648221 + ... + 648252.

Almost surely, 2^20743568 is an apocalyptic number.

It is an amenable number.

20743568 is a deficient number, since it is larger than the sum of its proper divisors (19447126).

20743568 is a wasteful number, since it uses less digits than its factorization.

20743568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296481 (or 1296475 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20743568 is about 4554.5107311324. The cubic root of 20743568 is about 274.7648369770.

The spelling of 20743568 in words is "twenty million, seven hundred forty-three thousand, five hundred sixty-eight".