20551501511134 has 16 divisors (see below), whose sum is σ = 33630285118320. Its totient is φ = 9341437325760.

The previous prime is 20551501511131. The next prime is 20551501511137. The reversal of 20551501511134 is 43111510515502.

It is an interprime number because it is at equal distance from previous prime (20551501511131) and next prime (20551501511137).

It is a self number, because there is not a number n which added to its sum of digits gives 20551501511134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551501511131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6345669 + ... + 9020560.

It is an arithmetic number, because the mean of its divisors is an integer number (2101892819895).

Almost surely, 2^{20551501511134} is an apocalyptic number.

20551501511134 is a deficient number, since it is larger than the sum of its proper divisors (13078783607186).

20551501511134 is a wasteful number, since it uses less digits than its factorization.

20551501511134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15427035.

The product of its (nonzero) digits is 15000, while the sum is 34.

The spelling of 20551501511134 in words is "twenty trillion, five hundred fifty-one billion, five hundred one million, five hundred eleven thousand, one hundred thirty-four".