20211455424 has 112 divisors (see below), whose sum is σ = 54986749056. Its totient is φ = 6547276800.

The previous prime is 20211455377. The next prime is 20211455437. The reversal of 20211455424 is 42455411202.

It is a junction number, because it is equal to n+sod(n) for n = 20211455391 and 20211455400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11159479 + ... + 11161289.

Almost surely, 2^20211455424 is an apocalyptic number.

20211455424 is a gapful number since it is divisible by the number (24) 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 20211455424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27493374528).

20211455424 is an abundant number, since it is smaller than the sum of its proper divisors (34775293632).

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

20211455424 is a wasteful number, since it uses less digits than its factorization.

20211455424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 20211455424 its reverse (42455411202), we get a palindrome (62666866626).

The spelling of 20211455424 in words is "twenty billion, two hundred eleven million, four hundred fifty-five thousand, four hundred twenty-four".