20261447160145 has 8 divisors (see below), whose sum is σ = 24314434649640. Its totient is φ = 16208692356480.

The previous prime is 20261447160137. The next prime is 20261447160247. The reversal of 20261447160145 is 54106174416202.

It can be written as a sum of positive squares in 4 ways, for example, as 339971791041 + 19921475369104 = 583071^2 + 4463348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20261447160145 - 2³ = 20261447160137 is a prime.

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, 57979830 + ... + 58328239.

It is an arithmetic number, because the mean of its divisors is an integer number (3039304331205).

Almost surely, 2^{20261447160145} is an apocalyptic number.

It is an amenable number.

20261447160145 is a deficient number, since it is larger than the sum of its proper divisors (4052987489495).

20261447160145 is a wasteful number, since it uses less digits than its factorization.

20261447160145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116342915.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 20261447160145 in words is "twenty trillion, two hundred sixty-one billion, four hundred forty-seven million, one hundred sixty thousand, one hundred forty-five".