20577771025 has 24 divisors (see below), whose sum is σ = 29226700800. Its totient is φ = 14078991360.

The previous prime is 20577770981. The next prime is 20577771047. The reversal of 20577771025 is 52017777502.

It is not a de Polignac number, because 20577771025 - 2¹³ = 20577762833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52369 + ... + 209518.

It is an arithmetic number, because the mean of its divisors is an integer number (1217779200).

Almost surely, 2^20577771025 is an apocalyptic number.

20577771025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20577771025 is a deficient number, since it is larger than the sum of its proper divisors (8648929775).

20577771025 is a wasteful number, since it uses less digits than its factorization.

20577771025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262353 (or 262348 counting only the distinct ones).

The product of its (nonzero) digits is 240100, while the sum is 43.

The spelling of 20577771025 in words is "twenty billion, five hundred seventy-seven million, seven hundred seventy-one thousand, twenty-five".