21350063155 has 8 divisors (see below), whose sum is σ = 25620931584. Its totient is φ = 17079480000.

The previous prime is 21350063131. The next prime is 21350063179. The reversal of 21350063155 is 55136005312.

It is an interprime number because it is at equal distance from previous prime (21350063131) and next prime (21350063179).

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

It is not a de Polignac number, because 21350063155 - 2⁷ = 21350063027 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163815 + ... + 263695.

It is an arithmetic number, because the mean of its divisors is an integer number (3202616448).

Almost surely, 2^21350063155 is an apocalyptic number.

21350063155 is a deficient number, since it is larger than the sum of its proper divisors (4270868429).

21350063155 is an equidigital number, since it uses as much as digits as its factorization.

21350063155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142637.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 21350063155 its reverse (55136005312), we get a palindrome (76486068467).

The spelling of 21350063155 in words is "twenty-one billion, three hundred fifty million, sixty-three thousand, one hundred fifty-five".