20768496 has 80 divisors (see below), whose sum is σ = 61972224. Its totient is φ = 5870592.

The previous prime is 20768491. The next prime is 20768497. The reversal of 20768496 is 69486702.

It is a super-2 number, since 2×20768496² = 862660852204032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37695 + ... + 38241.

Almost surely, 2^20768496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20768496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30986112).

20768496 is an abundant number, since it is smaller than the sum of its proper divisors (41203728).

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

20768496 is a wasteful number, since it uses less digits than its factorization.

20768496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 20768496 is about 4557.2465371099. The cubic root of 20768496 is about 274.8748565586.

The spelling of 20768496 in words is "twenty million, seven hundred sixty-eight thousand, four hundred ninety-six".