21048620 has 12 divisors (see below), whose sum is σ = 44202144. Its totient is φ = 8419440.

The previous prime is 21048617. The next prime is 21048641. The reversal of 21048620 is 2684012.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

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, 526196 + ... + 526235.

It is an arithmetic number, because the mean of its divisors is an integer number (3683512).

Almost surely, 2^21048620 is an apocalyptic number.

21048620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21048620 is an abundant number, since it is smaller than the sum of its proper divisors (23153524).

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

21048620 is a wasteful number, since it uses less digits than its factorization.

21048620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052440 (or 1052438 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 21048620 is about 4587.8775049035. The cubic root of 21048620 is about 276.1051724083.

The spelling of 21048620 in words is "twenty-one million, forty-eight thousand, six hundred twenty".