20948988 has 12 divisors (see below), whose sum is σ = 48881000. Its totient is φ = 6982992.

The previous prime is 20948987. The next prime is 20948989. The reversal of 20948988 is 88984902.

It is an interprime number because it is at equal distance from previous prime (20948987) and next prime (20948989).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20948987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872863 + ... + 872886.

Almost surely, 2^20948988 is an apocalyptic number.

It is an amenable number.

20948988 is an abundant number, since it is smaller than the sum of its proper divisors (27932012).

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

20948988 is a wasteful number, since it uses less digits than its factorization.

20948988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745756 (or 1745754 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 20948988 is about 4577.0064452653. The cubic root of 20948988 is about 275.6688424764.

The spelling of 20948988 in words is "twenty million, nine hundred forty-eight thousand, nine hundred eighty-eight".