20470620 has 48 divisors (see below), whose sum is σ = 58873248. Its totient is φ = 5310720.

The previous prime is 20470573. The next prime is 20470627. The reversal of 20470620 is 2607402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20470627) by changing a digit.

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, 2391 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (1226526).

Almost surely, 2^20470620 is an apocalyptic number.

20470620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20470620 is an abundant number, since it is smaller than the sum of its proper divisors (38402628).

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

20470620 is a wasteful number, since it uses less digits than its factorization.

20470620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9270 (or 9268 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20470620 is about 4524.4469275261. The cubic root of 20470620 is about 273.5543753647.

The spelling of 20470620 in words is "twenty million, four hundred seventy thousand, six hundred twenty".