20486945290240 has 576 divisors, whose sum is σ = 58517797796640. Its totient is φ = 6837770649600.

The previous prime is 20486945290153. The next prime is 20486945290249. The reversal of 20486945290240 is 4209254968402.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20486945290249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2915457607 + ... + 2915464633.

Almost surely, 2^{20486945290240} is an apocalyptic number.

20486945290240 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 20486945290240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29258898898320).

20486945290240 is an abundant number, since it is smaller than the sum of its proper divisors (38030852506400).

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

20486945290240 is a wasteful number, since it uses less digits than its factorization.

20486945290240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270 (or 7239 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 20486945290240 in words is "twenty trillion, four hundred eighty-six billion, nine hundred forty-five million, two hundred ninety thousand, two hundred forty".