20405730351020 has 48 divisors (see below), whose sum is σ = 48990931546368. Its totient is φ = 6993796305600.

The previous prime is 20405730350977. The next prime is 20405730351059. The reversal of 20405730351020 is 2015303750402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25162982 + ... + 25961261.

It is an arithmetic number, because the mean of its divisors is an integer number (1020644407216).

Almost surely, 2^{20405730351020} is an apocalyptic number.

20405730351020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20405730351020 is an abundant number, since it is smaller than the sum of its proper divisors (28585201195348).

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

20405730351020 is a wasteful number, since it uses less digits than its factorization.

20405730351020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51127110 (or 51127108 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 20405730351020 in words is "twenty trillion, four hundred five billion, seven hundred thirty million, three hundred fifty-one thousand, twenty".