20299320 has 96 divisors (see below), whose sum is σ = 66690000. Its totient is φ = 5354496.

The previous prime is 20299303. The next prime is 20299337. The reversal of 20299320 is 2399202.

It is an interprime number because it is at equal distance from previous prime (20299303) and next prime (20299337).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40431 + ... + 40929.

Almost surely, 2^20299320 is an apocalyptic number.

20299320 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 20299320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33345000).

20299320 is an abundant number, since it is smaller than the sum of its proper divisors (46390680).

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

20299320 is a wasteful number, since it uses less digits than its factorization.

20299320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20299320 is about 4505.4766673461. The cubic root of 20299320 is about 272.7891944247.

The spelling of 20299320 in words is "twenty million, two hundred ninety-nine thousand, three hundred twenty".