21007282029 has 16 divisors (see below), whose sum is σ = 29025784320. Its totient is φ = 13500334080.

The previous prime is 21007282027. The next prime is 21007282031. The reversal of 21007282029 is 92028270012.

It is an interprime number because it is at equal distance from previous prime (21007282027) and next prime (21007282031).

It is not a de Polignac number, because 21007282029 - 2¹ = 21007282027 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21007282027) 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, 415564 + ... + 463365.

It is an arithmetic number, because the mean of its divisors is an integer number (1814111520).

Almost surely, 2^21007282029 is an apocalyptic number.

It is an amenable number.

21007282029 is a deficient number, since it is larger than the sum of its proper divisors (8018502291).

21007282029 is a wasteful number, since it uses less digits than its factorization.

21007282029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879220.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 21007282029 in words is "twenty-one billion, seven million, two hundred eighty-two thousand, twenty-nine".