20100427077730 has 32 divisors (see below), whose sum is σ = 36316674570240. Its totient is φ = 8009973455040.

The previous prime is 20100427077683. The next prime is 20100427077769. The reversal of 20100427077730 is 3777072400102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42166356 + ... + 42640384.

It is an arithmetic number, because the mean of its divisors is an integer number (1134896080320).

Almost surely, 2^{20100427077730} is an apocalyptic number.

20100427077730 is a deficient number, since it is larger than the sum of its proper divisors (16216247492510).

20100427077730 is a wasteful number, since it uses less digits than its factorization.

20100427077730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489954.

The product of its (nonzero) digits is 115248, while the sum is 40.

Adding to 20100427077730 its reverse (3777072400102), we get a palindrome (23877499477832).

The spelling of 20100427077730 in words is "twenty trillion, one hundred billion, four hundred twenty-seven million, seventy-seven thousand, seven hundred thirty".