20940648 has 32 divisors (see below), whose sum is σ = 52509600. Its totient is φ = 6959168.

The previous prime is 20940637. The next prime is 20940677. The reversal of 20940648 is 84604902.

It is a super-3 number, since 3×20940648³ (a number of 23 digits) contains 333 as substring.

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, 8215 + ... + 10457.

It is an arithmetic number, because the mean of its divisors is an integer number (1640925).

Almost surely, 2^20940648 is an apocalyptic number.

It is an amenable number.

20940648 is an abundant number, since it is smaller than the sum of its proper divisors (31568952).

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

20940648 is a wasteful number, since it uses less digits than its factorization.

20940648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2637 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20940648 is about 4576.0952787284. The cubic root of 20940648 is about 275.6322554535.

The spelling of 20940648 in words is "twenty million, nine hundred forty thousand, six hundred forty-eight".