20958473 has 2 divisors, whose sum is σ = 20958474. Its totient is φ = 20958472.

The previous prime is 20958461. The next prime is 20958517. The reversal of 20958473 is 37485902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20097289 + 861184 = 4483^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 20958473 - 2¹² = 20954377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20958403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10479236 + 10479237.

It is an arithmetic number, because the mean of its divisors is an integer number (10479237).

Almost surely, 2^20958473 is an apocalyptic number.

It is an amenable number.

20958473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20958473 is an equidigital number, since it uses as much as digits as its factorization.

20958473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20958473 is about 4578.0424856045. The cubic root of 20958473 is about 275.7104407380.

The spelling of 20958473 in words is "twenty million, nine hundred fifty-eight thousand, four hundred seventy-three".