20925029 has 2 divisors, whose sum is σ = 20925030. Its totient is φ = 20925028.

The previous prime is 20925019. The next prime is 20925041. The reversal of 20925029 is 92052902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 8988004 = 3455^2 + 2998^2 .

It is a cyclic number.

It is not a de Polignac number, because 20925029 - 2²⁰ = 19876453 is a prime.

It is a super-4 number, since 4×20925029⁴ (a number of 30 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20924992 and 20925010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20925019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10462514 + 10462515.

It is an arithmetic number, because the mean of its divisors is an integer number (10462515).

Almost surely, 2^20925029 is an apocalyptic number.

It is an amenable number.

20925029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20925029 is an equidigital number, since it uses as much as digits as its factorization.

20925029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20925029 is about 4574.3883744168. The cubic root of 20925029 is about 275.5637098035.

The spelling of 20925029 in words is "twenty million, nine hundred twenty-five thousand, twenty-nine".