20755515134 has 4 divisors (see below), whose sum is σ = 31133272704. Its totient is φ = 10377757566.

The previous prime is 20755515133. The next prime is 20755515173. The reversal of 20755515134 is 43151555702.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755515133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5188878782 + ... + 5188878785.

It is an arithmetic number, because the mean of its divisors is an integer number (7783318176).

Almost surely, 2^20755515134 is an apocalyptic number.

20755515134 is a deficient number, since it is larger than the sum of its proper divisors (10377757570).

20755515134 is a wasteful number, since it uses less digits than its factorization.

20755515134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377757569.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 20755515134 in words is "twenty billion, seven hundred fifty-five million, five hundred fifteen thousand, one hundred thirty-four".