20867421120 has 448 divisors, whose sum is σ = 86346279936. Its totient is φ = 4143513600.

The previous prime is 20867421119. The next prime is 20867421143. The reversal of 20867421120 is 2112476802.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1478095 + ... + 1492145.

It is an arithmetic number, because the mean of its divisors is an integer number (192737232).

Almost surely, 2^20867421120 is an apocalyptic number.

20867421120 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 20867421120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43173139968).

20867421120 is an abundant number, since it is smaller than the sum of its proper divisors (65478858816).

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

20867421120 is a wasteful number, since it uses less digits than its factorization.

20867421120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14108 (or 14098 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

Adding to 20867421120 its reverse (2112476802), we get a palindrome (22979897922).

The spelling of 20867421120 in words is "twenty billion, eight hundred sixty-seven million, four hundred twenty-one thousand, one hundred twenty".