20355111433740 has 24 divisors (see below), whose sum is σ = 56994312014640. Its totient is φ = 5428029715648.

The previous prime is 20355111433729. The next prime is 20355111433823. The reversal of 20355111433740 is 4733411155302.

It is a super-2 number, since 2×20355111433740² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169625928555 + ... + 169625928674.

It is an arithmetic number, because the mean of its divisors is an integer number (2374763000610).

Almost surely, 2^{20355111433740} is an apocalyptic number.

20355111433740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20355111433740 is an abundant number, since it is smaller than the sum of its proper divisors (36639200580900).

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

20355111433740 is a wasteful number, since it uses less digits than its factorization.

20355111433740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339251857241 (or 339251857239 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 20355111433740 in words is "twenty trillion, three hundred fifty-five billion, one hundred eleven million, four hundred thirty-three thousand, seven hundred forty".