20773205135540 has 96 divisors (see below), whose sum is σ = 53478529364736. Its totient is φ = 6669657815040.

The previous prime is 20773205135513. The next prime is 20773205135567. The reversal of 20773205135540 is 4553150237702.

It is an interprime number because it is at equal distance from previous prime (20773205135513) and next prime (20773205135567).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 20773205135491 and 20773205135500.

It is a congruent number.

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, 157833317 + ... + 157964876.

It is an arithmetic number, because the mean of its divisors is an integer number (557068014216).

Almost surely, 2^{20773205135540} is an apocalyptic number.

20773205135540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20773205135540 is an abundant number, since it is smaller than the sum of its proper divisors (32705324229196).

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

20773205135540 is a wasteful number, since it uses less digits than its factorization.

20773205135540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315798249 (or 315798247 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 44.

The spelling of 20773205135540 in words is "twenty trillion, seven hundred seventy-three billion, two hundred five million, one hundred thirty-five thousand, five hundred forty".