20621424513 has 8 divisors (see below), whose sum is σ = 27557300448. Its totient is φ = 13716582464.

The previous prime is 20621424503. The next prime is 20621424587. The reversal of 20621424513 is 31542412602.

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

It is a cyclic number.

It is not a de Polignac number, because 20621424513 - 2¹⁰ = 20621423489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20621424503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7756920 + ... + 7759577.

It is an arithmetic number, because the mean of its divisors is an integer number (3444662556).

Almost surely, 2^20621424513 is an apocalyptic number.

It is an amenable number.

20621424513 is a deficient number, since it is larger than the sum of its proper divisors (6935875935).

20621424513 is a wasteful number, since it uses less digits than its factorization.

20621424513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15516943.

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 20621424513 in words is "twenty billion, six hundred twenty-one million, four hundred twenty-four thousand, five hundred thirteen".