20542136495 has 8 divisors (see below), whose sum is σ = 25068370320. Its totient is φ = 16155171520.

The previous prime is 20542136393. The next prime is 20542136497. The reversal of 20542136495 is 59463124502.

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

It is not a de Polignac number, because 20542136495 - 2¹² = 20542132399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542136497) 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, 34816886 + ... + 34817475.

It is an arithmetic number, because the mean of its divisors is an integer number (3133546290).

Almost surely, 2^20542136495 is an apocalyptic number.

20542136495 is a deficient number, since it is larger than the sum of its proper divisors (4526233825).

20542136495 is an equidigital number, since it uses as much as digits as its factorization.

20542136495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69634425.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20542136495 in words is "twenty billion, five hundred forty-two million, one hundred thirty-six thousand, four hundred ninety-five".