20415505211653 has 4 divisors (see below), whose sum is σ = 20540753710048. Its totient is φ = 20290256713260.

The previous prime is 20415505211611. The next prime is 20415505211663. The reversal of 20415505211653 is 35611250551402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20415505211653 - 2³³ = 20406915277061 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 (20415505211663) 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, 62624248953 + ... + 62624249278.

It is an arithmetic number, because the mean of its divisors is an integer number (5135188427512).

Almost surely, 2^{20415505211653} is an apocalyptic number.

It is an amenable number.

20415505211653 is a deficient number, since it is larger than the sum of its proper divisors (125248498395).

20415505211653 is a wasteful number, since it uses less digits than its factorization.

20415505211653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125248498394.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 20415505211653 in words is "twenty trillion, four hundred fifteen billion, five hundred five million, two hundred eleven thousand, six hundred fifty-three".