20861048 has 16 divisors (see below), whose sum is σ = 42123480. Its totient is φ = 9628128.

The previous prime is 20861033. The next prime is 20861051. The reversal of 20861048 is 84016802.

It is a self number, because there is not a number n which added to its sum of digits gives 20861048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100190 + ... + 100397.

Almost surely, 2^20861048 is an apocalyptic number.

It is an amenable number.

20861048 is an abundant number, since it is smaller than the sum of its proper divisors (21262432).

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

20861048 is a wasteful number, since it uses less digits than its factorization.

20861048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200606 (or 200602 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20861048 is about 4567.3896264716. The cubic root of 20861048 is about 275.2825657592.

The spelling of 20861048 in words is "twenty million, eight hundred sixty-one thousand, forty-eight".