20151044342155 has 8 divisors (see below), whose sum is σ = 24181410885552. Its totient is φ = 16120730357088.

The previous prime is 20151044342131. The next prime is 20151044342269. The reversal of 20151044342155 is 55124344015102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20151044342155 is a prime.

It is a Duffinian 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, 12291112 + ... + 13833781.

It is an arithmetic number, because the mean of its divisors is an integer number (3022676360694).

Almost surely, 2^{20151044342155} is an apocalyptic number.

20151044342155 is a deficient number, since it is larger than the sum of its proper divisors (4030366543397).

20151044342155 is a wasteful number, since it uses less digits than its factorization.

20151044342155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26279165.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 20151044342155 its reverse (55124344015102), we get a palindrome (75275388357257).

The spelling of 20151044342155 in words is "twenty trillion, one hundred fifty-one billion, forty-four million, three hundred forty-two thousand, one hundred fifty-five".