20602503217920 has 288 divisors, whose sum is σ = 70979126400000. Its totient is φ = 5062911639552.

The previous prime is 20602503217883. The next prime is 20602503217937. The reversal of 20602503217920 is 2971230520602.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29557581 + ... + 30246579.

It is an arithmetic number, because the mean of its divisors is an integer number (246455300000).

Almost surely, 2^{20602503217920} is an apocalyptic number.

20602503217920 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 20602503217920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35489563200000).

20602503217920 is an abundant number, since it is smaller than the sum of its proper divisors (50376623182080).

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

20602503217920 is a wasteful number, since it uses less digits than its factorization.

20602503217920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689635 (or 689621 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 20602503217920 in words is "twenty trillion, six hundred two billion, five hundred three million, two hundred seventeen thousand, nine hundred twenty".