21603217772157 has 16 divisors (see below), whose sum is σ = 32919629443200. Its totient is φ = 12344530698432.

The previous prime is 21603217772131. The next prime is 21603217772161. The reversal of 21603217772157 is 75127771230612.

It is not a de Polignac number, because 21603217772157 - 2²⁸ = 21602949336701 is a prime.

It is a super-2 number, since 2×21603217772157² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603217773157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5266438 + ... + 8422695.

It is an arithmetic number, because the mean of its divisors is an integer number (2057476840200).

Almost surely, 2^{21603217772157} is an apocalyptic number.

It is an amenable number.

21603217772157 is a deficient number, since it is larger than the sum of its proper divisors (11316411671043).

21603217772157 is a wasteful number, since it uses less digits than its factorization.

21603217772157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13764292.

The product of its (nonzero) digits is 1728720, while the sum is 51.

The spelling of 21603217772157 in words is "twenty-one trillion, six hundred three billion, two hundred seventeen million, seven hundred seventy-two thousand, one hundred fifty-seven".