20870163480 has 128 divisors (see below), whose sum is σ = 64727470080. Its totient is φ = 5377743360.

The previous prime is 20870163473. The next prime is 20870163487. The reversal of 20870163480 is 8436107802.

It is an interprime number because it is at equal distance from previous prime (20870163473) and next prime (20870163487).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20870163487) by changing a digit.

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, 2700582 + ... + 2708298.

It is an arithmetic number, because the mean of its divisors is an integer number (505683360).

Almost surely, 2^20870163480 is an apocalyptic number.

20870163480 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 20870163480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32363735040).

20870163480 is an abundant number, since it is smaller than the sum of its proper divisors (43857306600).

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

20870163480 is a wasteful number, since it uses less digits than its factorization.

20870163480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489 (or 8485 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 20870163480 in words is "twenty billion, eight hundred seventy million, one hundred sixty-three thousand, four hundred eighty".