20743968 has 48 divisors (see below), whose sum is σ = 62233920. Its totient is φ = 5926656.

The previous prime is 20743949. The next prime is 20743973. The reversal of 20743968 is 86934702.

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

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, 14763 + ... + 16106.

It is an arithmetic number, because the mean of its divisors is an integer number (1296540).

Almost surely, 2^20743968 is an apocalyptic number.

20743968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20743968 is an abundant number, since it is smaller than the sum of its proper divisors (41489952).

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

20743968 is a wasteful number, since it uses less digits than its factorization.

20743968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30889 (or 30881 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20743968 is about 4554.5546434311. The cubic root of 20743968 is about 274.7666030702.

The spelling of 20743968 in words is "twenty million, seven hundred forty-three thousand, nine hundred sixty-eight".