20434520004151 has 4 divisors (see below), whose sum is σ = 22292203640904. Its totient is φ = 18576836367400.

The previous prime is 20434520004149. The next prime is 20434520004163. The reversal of 20434520004151 is 15140002543402.

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

It is a cyclic number.

It is not a de Polignac number, because 20434520004151 - 2¹ = 20434520004149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434520008151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928841818360 + ... + 928841818381.

It is an arithmetic number, because the mean of its divisors is an integer number (5573050910226).

Almost surely, 2^{20434520004151} is an apocalyptic number.

20434520004151 is a deficient number, since it is larger than the sum of its proper divisors (1857683636753).

20434520004151 is a wasteful number, since it uses less digits than its factorization.

20434520004151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857683636752.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 20434520004151 its reverse (15140002543402), we get a palindrome (35574522547553).

The spelling of 20434520004151 in words is "twenty trillion, four hundred thirty-four billion, five hundred twenty million, four thousand, one hundred fifty-one".