20134434155 has 16 divisors (see below), whose sum is σ = 26455085568. Its totient is φ = 14589180000.

The previous prime is 20134434127. The next prime is 20134434161. The reversal of 20134434155 is 55143443102.

It is not a de Polignac number, because 20134434155 - 2⁶ = 20134434091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660521 + ... + 690330.

It is an arithmetic number, because the mean of its divisors is an integer number (1653442848).

Almost surely, 2^20134434155 is an apocalyptic number.

20134434155 is a deficient number, since it is larger than the sum of its proper divisors (6320651413).

20134434155 is a wasteful number, since it uses less digits than its factorization.

20134434155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351138.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 20134434155 its reverse (55143443102), we get a palindrome (75277877257).

The spelling of 20134434155 in words is "twenty billion, one hundred thirty-four million, four hundred thirty-four thousand, one hundred fifty-five".