20299776 has 120 divisors (see below), whose sum is σ = 62912640. Its totient is φ = 5701632.

The previous prime is 20299757. The next prime is 20299781. The reversal of 20299776 is 67799202.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344035 + ... + 344093.

It is an arithmetic number, because the mean of its divisors is an integer number (524272).

Almost surely, 2^20299776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20299776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31456320).

20299776 is an abundant number, since it is smaller than the sum of its proper divisors (42612864).

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

20299776 is an frugal number, since it uses more digits than its factorization.

20299776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 20299776 is about 4505.5272721403. The cubic root of 20299776 is about 272.7912370373.

The spelling of 20299776 in words is "twenty million, two hundred ninety-nine thousand, seven hundred seventy-six".