20212554648 has 256 divisors, whose sum is σ = 60825945600. Its totient is φ = 5516328960.

The previous prime is 20212554643. The next prime is 20212554679. The reversal of 20212554648 is 84645521202.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212554643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35030136 + ... + 35030712.

It is an arithmetic number, because the mean of its divisors is an integer number (237601350).

Almost surely, 2^20212554648 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 20212554648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30412972800).

20212554648 is an abundant number, since it is smaller than the sum of its proper divisors (40613390952).

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

20212554648 is a wasteful number, since it uses less digits than its factorization.

20212554648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 20212554648 in words is "twenty billion, two hundred twelve million, five hundred fifty-four thousand, six hundred forty-eight".