20134052315421 has 16 divisors (see below), whose sum is σ = 30295752701760. Its totient is φ = 11781681605120.

The previous prime is 20134052315417. The next prime is 20134052315437. The reversal of 20134052315421 is 12451325043102.

It is a cyclic number.

It is not a de Polignac number, because 20134052315421 - 2² = 20134052315417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134052315821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10519357620 + ... + 10519359533.

It is an arithmetic number, because the mean of its divisors is an integer number (1893484543860).

Almost surely, 2^{20134052315421} is an apocalyptic number.

It is an amenable number.

20134052315421 is a deficient number, since it is larger than the sum of its proper divisors (10161700386339).

20134052315421 is a wasteful number, since it uses less digits than its factorization.

20134052315421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21038717196.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 20134052315421 its reverse (12451325043102), we get a palindrome (32585377358523).

The spelling of 20134052315421 in words is "twenty trillion, one hundred thirty-four billion, fifty-two million, three hundred fifteen thousand, four hundred twenty-one".