20453121534 has 16 divisors (see below), whose sum is σ = 42225799680. Its totient is φ = 6597781080.

The previous prime is 20453121529. The next prime is 20453121581. The reversal of 20453121534 is 43512135402.

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, 54981324 + ... + 54981695.

It is an arithmetic number, because the mean of its divisors is an integer number (2639112480).

Almost surely, 2^20453121534 is an apocalyptic number.

20453121534 is an abundant number, since it is smaller than the sum of its proper divisors (21772678146).

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

20453121534 is a wasteful number, since it uses less digits than its factorization.

20453121534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109963055.

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

Adding to 20453121534 its reverse (43512135402), we get a palindrome (63965256936).

The spelling of 20453121534 in words is "twenty billion, four hundred fifty-three million, one hundred twenty-one thousand, five hundred thirty-four".