20321421526061 has 8 divisors (see below), whose sum is σ = 20485909065600. Its totient is φ = 20157500209600.

The previous prime is 20321421526031. The next prime is 20321421526069. The reversal of 20321421526061 is 16062512412302.

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 20321421526061 - 2³⁰ = 20320347784237 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 (20321421526069) 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, 141483701 + ... + 141627258.

It is an arithmetic number, because the mean of its divisors is an integer number (2560738633200).

Almost surely, 2^{20321421526061} is an apocalyptic number.

It is an amenable number.

20321421526061 is a deficient number, since it is larger than the sum of its proper divisors (164487539539).

20321421526061 is a wasteful number, since it uses less digits than its factorization.

20321421526061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283111539.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 20321421526061 its reverse (16062512412302), we get a palindrome (36383933938363).

The spelling of 20321421526061 in words is "twenty trillion, three hundred twenty-one billion, four hundred twenty-one million, five hundred twenty-six thousand, sixty-one".