20401775134 has 16 divisors (see below), whose sum is σ = 33657922368. Its totient is φ = 9215858592.

The previous prime is 20401775129. The next prime is 20401775159. The reversal of 20401775134 is 43157710402.

It is a self number, because there is not a number n which added to its sum of digits gives 20401775134.

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, 8346477 + ... + 8348920.

It is an arithmetic number, because the mean of its divisors is an integer number (2103620148).

Almost surely, 2^20401775134 is an apocalyptic number.

20401775134 is a deficient number, since it is larger than the sum of its proper divisors (13256147234).

20401775134 is a wasteful number, since it uses less digits than its factorization.

20401775134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16695459.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 20401775134 in words is "twenty billion, four hundred one million, seven hundred seventy-five thousand, one hundred thirty-four".