4020663720 has 128 divisors (see below), whose sum is σ = 12905424000. Its totient is φ = 999060480.

The previous prime is 4020663671. The next prime is 4020663749. The reversal of 4020663720 is 273660204.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124626 + ... + 153534.

It is an arithmetic number, because the mean of its divisors is an integer number (100823625).

Almost surely, 2^4020663720 is an apocalyptic number.

4020663720 is a gapful number since it is divisible by the number (40) 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 4020663720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6452712000).

4020663720 is an abundant number, since it is smaller than the sum of its proper divisors (8884760280).

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

4020663720 is a wasteful number, since it uses less digits than its factorization.

4020663720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29003 (or 28999 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 4020663720 is about 63408.7038189553. The cubic root of 4020663720 is about 1590.1298260354.

The spelling of 4020663720 in words is "four billion, twenty million, six hundred sixty-three thousand, seven hundred twenty".