20360780 has 48 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 7012800.

The previous prime is 20360779. The next prime is 20360833. The reversal of 20360780 is 8706302.

It is a super-4 number, since 4×20360780⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1745 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120).

Almost surely, 2^20360780 is an apocalyptic number.

20360780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20360780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24554880).

20360780 is an abundant number, since it is smaller than the sum of its proper divisors (28748980).

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

20360780 is a wasteful number, since it uses less digits than its factorization.

20360780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910 (or 4908 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20360780 is about 4512.2921004740. The cubic root of 20360780 is about 273.0642238663.

The spelling of 20360780 in words is "twenty million, three hundred sixty thousand, seven hundred eighty".