20215502242 has 8 divisors (see below), whose sum is σ = 32655811356. Its totient is φ = 9330231792.

The previous prime is 20215502233. The next prime is 20215502267. The reversal of 20215502242 is 24220551202.

It can be written as a sum of positive squares in 2 ways, for example, as 16951779601 + 3263722641 = 130199^2 + 57129^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388759633 + ... + 388759684.

Almost surely, 2^20215502242 is an apocalyptic number.

20215502242 is a deficient number, since it is larger than the sum of its proper divisors (12440309114).

20215502242 is a wasteful number, since it uses less digits than its factorization.

20215502242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777519332.

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 20215502242 in words is "twenty billion, two hundred fifteen million, five hundred two thousand, two hundred forty-two".