20549155158195 has 32 divisors (see below), whose sum is σ = 35935676282880. Its totient is φ = 9982132293120.

The previous prime is 20549155158151. The next prime is 20549155158199. The reversal of 20549155158195 is 59185155194502.

It is not a de Polignac number, because 20549155158195 - 2⁸ = 20549155157939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20549155158199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1299748905 + ... + 1299764714.

It is an arithmetic number, because the mean of its divisors is an integer number (1122989883840).

Almost surely, 2^{20549155158195} is an apocalyptic number.

20549155158195 is a deficient number, since it is larger than the sum of its proper divisors (15386521124685).

20549155158195 is a wasteful number, since it uses less digits than its factorization.

20549155158195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599513675.

The product of its (nonzero) digits is 16200000, while the sum is 60.

The spelling of 20549155158195 in words is "twenty trillion, five hundred forty-nine billion, one hundred fifty-five million, one hundred fifty-eight thousand, one hundred ninety-five".