136464020021 has 8 divisors (see below), whose sum is σ = 158155484544. Its totient is φ = 115321706640.

The previous prime is 136464019919. The next prime is 136464020029. The reversal of 136464020021 is 120020464631.

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

It is not a de Polignac number, because 136464020021 - 2¹⁰ = 136464018997 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 (136464020029) 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, 137287250 + ... + 137288243.

It is an arithmetic number, because the mean of its divisors is an integer number (19769435568).

Almost surely, 2^136464020021 is an apocalyptic number.

It is an amenable number.

136464020021 is a deficient number, since it is larger than the sum of its proper divisors (21691464523).

136464020021 is an equidigital number, since it uses as much as digits as its factorization.

136464020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274575571.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 136464020021 its reverse (120020464631), we get a palindrome (256484484652).

The spelling of 136464020021 in words is "one hundred thirty-six billion, four hundred sixty-four million, twenty thousand, twenty-one".