20215049472 has 216 divisors, whose sum is σ = 61028656416. Its totient is φ = 6673176576.

The previous prime is 20215049453. The next prime is 20215049507. The reversal of 20215049472 is 27494051202.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6654738 + ... + 6657774.

It is an arithmetic number, because the mean of its divisors is an integer number (282540076).

Almost surely, 2^20215049472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20215049472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30514328208).

20215049472 is an abundant number, since it is smaller than the sum of its proper divisors (40813606944).

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

20215049472 is an equidigital number, since it uses as much as digits as its factorization.

20215049472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175 (or 3149 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20215049472 in words is "twenty billion, two hundred fifteen million, forty-nine thousand, four hundred seventy-two".