20985048 has 64 divisors (see below), whose sum is σ = 66624000. Its totient is φ = 5995296.

The previous prime is 20985017. The next prime is 20985049. The reversal of 20985048 is 84058902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20985049) 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, 5428 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (1041000).

Almost surely, 2^20985048 is an apocalyptic number.

20985048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20985048 is an abundant number, since it is smaller than the sum of its proper divisors (45638952).

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

20985048 is a wasteful number, since it uses less digits than its factorization.

20985048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13901 (or 13891 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20985048 is about 4580.9440075164. The cubic root of 20985048 is about 275.8269236246.

The spelling of 20985048 in words is "twenty million, nine hundred eighty-five thousand, forty-eight".