20948730 has 96 divisors (see below), whose sum is σ = 57456000. Its totient is φ = 4878720.

The previous prime is 20948729. The next prime is 20948747. The reversal of 20948730 is 3784902.

It is a super-2 number, since 2×20948730² = 877698577225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20948691 and 20948700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105171 + ... + 105369.

It is an arithmetic number, because the mean of its divisors is an integer number (598500).

Almost surely, 2^20948730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20948730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28728000).

20948730 is an abundant number, since it is smaller than the sum of its proper divisors (36507270).

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

20948730 is a wasteful number, since it uses less digits than its factorization.

20948730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20948730 is about 4576.9782608179. The cubic root of 20948730 is about 275.6677107932.

The spelling of 20948730 in words is "twenty million, nine hundred forty-eight thousand, seven hundred thirty".