21203011929 has 8 divisors (see below), whose sum is σ = 30840744672. Its totient is φ = 12850310240.

The previous prime is 21203011903. The next prime is 21203011939. The reversal of 21203011929 is 92911030212.

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

It is a cyclic number.

It is not a de Polignac number, because 21203011929 - 2²⁰ = 21201963353 is a prime.

It is a super-2 number, since 2×21203011929² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203011896 and 21203011905.

It is not an unprimeable number, because it can be changed into a prime (21203011939) 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, 321257724 + ... + 321257789.

It is an arithmetic number, because the mean of its divisors is an integer number (3855093084).

Almost surely, 2^21203011929 is an apocalyptic number.

It is an amenable number.

21203011929 is a deficient number, since it is larger than the sum of its proper divisors (9637732743).

21203011929 is a wasteful number, since it uses less digits than its factorization.

21203011929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642515527.

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 21203011929 in words is "twenty-one billion, two hundred three million, eleven thousand, nine hundred twenty-nine".