20715221435 has 8 divisors (see below), whose sum is σ = 24860037696. Its totient is φ = 16570995840.

The previous prime is 20715221431. The next prime is 20715221441. The reversal of 20715221435 is 53412251702.

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

It is not a de Polignac number, because 20715221435 - 2² = 20715221431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20715221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66446 + ... + 214115.

It is an arithmetic number, because the mean of its divisors is an integer number (3107504712).

Almost surely, 2^20715221435 is an apocalyptic number.

20715221435 is a deficient number, since it is larger than the sum of its proper divisors (4144816261).

20715221435 is a wasteful number, since it uses less digits than its factorization.

20715221435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295333.

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 20715221435 in words is "twenty billion, seven hundred fifteen million, two hundred twenty-one thousand, four hundred thirty-five".