21019711761148 has 24 divisors (see below), whose sum is σ = 37514202954480. Its totient is φ = 10301745417600.

The previous prime is 21019711761143. The next prime is 21019711761163. The reversal of 21019711761148 is 84116711791012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21019711761143) 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, 46946353 + ... + 47391976.

It is an arithmetic number, because the mean of its divisors is an integer number (1563091789770).

Almost surely, 2^{21019711761148} is an apocalyptic number.

It is an amenable number.

21019711761148 is a deficient number, since it is larger than the sum of its proper divisors (16494491193332).

21019711761148 is a wasteful number, since it uses less digits than its factorization.

21019711761148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94339437 (or 94339435 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 49.

The spelling of 21019711761148 in words is "twenty-one trillion, nineteen billion, seven hundred eleven million, seven hundred sixty-one thousand, one hundred forty-eight".