20434510515 has 8 divisors (see below), whose sum is σ = 32695216848. Its totient is φ = 10898405600.

The previous prime is 20434510511. The next prime is 20434510519. The reversal of 20434510515 is 51501543402.

It is an interprime number because it is at equal distance from previous prime (20434510511) and next prime (20434510519).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20434510515 - 2² = 20434510511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434510511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681150336 + ... + 681150365.

It is an arithmetic number, because the mean of its divisors is an integer number (4086902106).

Almost surely, 2^20434510515 is an apocalyptic number.

20434510515 is a deficient number, since it is larger than the sum of its proper divisors (12260706333).

20434510515 is a wasteful number, since it uses less digits than its factorization.

20434510515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362300709.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20434510515 in words is "twenty billion, four hundred thirty-four million, five hundred ten thousand, five hundred fifteen".