20370020 has 48 divisors (see below), whose sum is σ = 47573568. Its totient is φ = 7263360.

The previous prime is 20370011. The next prime is 20370023. The reversal of 20370020 is 2007302.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 20369977 and 20370004.

It is not an unprimeable number, because it can be changed into a prime (20370023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10787 + ... + 12533.

It is an arithmetic number, because the mean of its divisors is an integer number (991116).

Almost surely, 2^20370020 is an apocalyptic number.

20370020 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 20370020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23786784).

20370020 is an abundant number, since it is smaller than the sum of its proper divisors (27203548).

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

20370020 is a wasteful number, since it uses less digits than its factorization.

20370020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 20370020 is about 4513.3158542251. The cubic root of 20370020 is about 273.1055243773.

Adding to 20370020 its reverse (2007302), we get a palindrome (22377322).

The spelling of 20370020 in words is "twenty million, three hundred seventy thousand, twenty".