20515422020240 has 320 divisors, whose sum is σ = 56765078802432. Its totient is φ = 6749887334400.

The previous prime is 20515422020231. The next prime is 20515422020257. The reversal of 20515422020240 is 4202022451502.

It is a happy number.

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, 361725485 + ... + 361782195.

Almost surely, 2^{20515422020240} is an apocalyptic number.

20515422020240 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 20515422020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28382539401216).

20515422020240 is an abundant number, since it is smaller than the sum of its proper divisors (36249656782192).

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

20515422020240 is a wasteful number, since it uses less digits than its factorization.

20515422020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57038 (or 57032 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 20515422020240 its reverse (4202022451502), we get a palindrome (24717444471742).

The spelling of 20515422020240 in words is "twenty trillion, five hundred fifteen billion, four hundred twenty-two million, twenty thousand, two hundred forty".