20213631927840 has 384 divisors, whose sum is σ = 71580083097600. Its totient is φ = 4757475520512.

The previous prime is 20213631927809. The next prime is 20213631927917. The reversal of 20213631927840 is 4872913631202.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20213631927840.

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, 387334389 + ... + 387386571.

It is an arithmetic number, because the mean of its divisors is an integer number (186406466400).

Almost surely, 2^{20213631927840} is an apocalyptic number.

20213631927840 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 20213631927840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35790041548800).

20213631927840 is an abundant number, since it is smaller than the sum of its proper divisors (51366451169760).

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

20213631927840 is a wasteful number, since it uses less digits than its factorization.

20213631927840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54936 (or 54928 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 20213631927840 in words is "twenty trillion, two hundred thirteen billion, six hundred thirty-one million, nine hundred twenty-seven thousand, eight hundred forty".