20523451134 has 16 divisors (see below), whose sum is σ = 41109008400. Its totient is φ = 6830799360.

The previous prime is 20523451111. The next prime is 20523451163. The reversal of 20523451134 is 43115432502.

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, 2583459 + ... + 2591390.

It is an arithmetic number, because the mean of its divisors is an integer number (2569313025).

Almost surely, 2^20523451134 is an apocalyptic number.

20523451134 is an abundant number, since it is smaller than the sum of its proper divisors (20585557266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20523451134 is a wasteful number, since it uses less digits than its factorization.

20523451134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175515.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20523451134 its reverse (43115432502), we get a palindrome (63638883636).

The spelling of 20523451134 in words is "twenty billion, five hundred twenty-three million, four hundred fifty-one thousand, one hundred thirty-four".