20029320 has 192 divisors, whose sum is σ = 70761600. Its totient is φ = 4899840.

The previous prime is 20029319. The next prime is 20029337. The reversal of 20029320 is 2392002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20029293 and 20029302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 339451 + ... + 339509.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

Almost surely, 2^20029320 is an apocalyptic number.

20029320 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 20029320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

20029320 is an abundant number, since it is smaller than the sum of its proper divisors (50732280).

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

20029320 is a wasteful number, since it uses less digits than its factorization.

20029320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20029320 is about 4475.4128301197. The cubic root of 20029320 is about 271.5743414341.

The spelling of 20029320 in words is "twenty million, twenty-nine thousand, three hundred twenty".