20265205415 has 16 divisors (see below), whose sum is σ = 29930150208. Its totient is φ = 12827206656.

The previous prime is 20265205409. The next prime is 20265205427. The reversal of 20265205415 is 51450256202.

It is a cyclic number.

It is not a de Polignac number, because 20265205415 - 2⁴ = 20265205399 is a prime.

It is a congruent 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, 22269002 + ... + 22269911.

It is an arithmetic number, because the mean of its divisors is an integer number (1870634388).

Almost surely, 2^20265205415 is an apocalyptic number.

20265205415 is a deficient number, since it is larger than the sum of its proper divisors (9664944793).

20265205415 is a wasteful number, since it uses less digits than its factorization.

20265205415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44538938.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 20265205415 in words is "twenty billion, two hundred sixty-five million, two hundred five thousand, four hundred fifteen".