20121048 has 40 divisors (see below), whose sum is σ = 56359380. Its totient is φ = 6706800.

The previous prime is 20121043. The next prime is 20121061. The reversal of 20121048 is 84012102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 20121048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14878 + ... + 16173.

Almost surely, 2^20121048 is an apocalyptic number.

It is an amenable number.

20121048 is an abundant number, since it is smaller than the sum of its proper divisors (36238332).

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

20121048 is a wasteful number, since it uses less digits than its factorization.

20121048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31069 (or 31056 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20121048 is about 4485.6491169060. The cubic root of 20121048 is about 271.9882852509.

The spelling of 20121048 in words is "twenty million, one hundred twenty-one thousand, forty-eight".