20105155030340 has 48 divisors (see below), whose sum is σ = 42305853486960. Its totient is φ = 8025867778560.

The previous prime is 20105155030333. The next prime is 20105155030343. The reversal of 20105155030340 is 4303055150102.

It can be written as a sum of positive squares in 8 ways, for example, as 1390809814276 + 18714345216064 = 1179326^2 + 4326008^2 .

It is not an unprimeable number, because it can be changed into a prime (20105155030343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295399754 + ... + 295467806.

It is an arithmetic number, because the mean of its divisors is an integer number (881371947645).

Almost surely, 2^{20105155030340} is an apocalyptic number.

20105155030340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20105155030340 is an abundant number, since it is smaller than the sum of its proper divisors (22200698456620).

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

20105155030340 is a wasteful number, since it uses less digits than its factorization.

20105155030340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97592 (or 97590 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 20105155030340 in words is "twenty trillion, one hundred five billion, one hundred fifty-five million, thirty thousand, three hundred forty".