20606251703880 has 128 divisors (see below), whose sum is σ = 62987777435520. Its totient is φ = 5391096023040.

The previous prime is 20606251703833. The next prime is 20606251703911. The reversal of 20606251703880 is 8830715260602.

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, 197623039 + ... + 197727281.

It is an arithmetic number, because the mean of its divisors is an integer number (492092011215).

Almost surely, 2^{20606251703880} is an apocalyptic number.

20606251703880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20606251703880 is an abundant number, since it is smaller than the sum of its proper divisors (42381525731640).

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

20606251703880 is a wasteful number, since it uses less digits than its factorization.

20606251703880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135391 (or 135387 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 20606251703880 in words is "twenty trillion, six hundred six billion, two hundred fifty-one million, seven hundred three thousand, eight hundred eighty".