20413502511566 has 16 divisors (see below), whose sum is σ = 30627929554560. Its totient is φ = 10204192854240.

The previous prime is 20413502511559. The next prime is 20413502511581. The reversal of 20413502511566 is 66511520531402.

It is a super-2 number, since 2×20413502511566² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407682380 + ... + 407732448.

It is an arithmetic number, because the mean of its divisors is an integer number (1914245597160).

Almost surely, 2^{20413502511566} is an apocalyptic number.

20413502511566 is a deficient number, since it is larger than the sum of its proper divisors (10214427042994).

20413502511566 is a wasteful number, since it uses less digits than its factorization.

20413502511566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97099.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 20413502511566 in words is "twenty trillion, four hundred thirteen billion, five hundred two million, five hundred eleven thousand, five hundred sixty-six".